MILE T. Takahashi Internet-Draft NICT Intended status: Standards Track R. Danyliw Expires: June 26, 2020 CERT M. Suzuki NICT December 24, 2019 JSON binding of IODEF draft-ietf-mile-jsoniodef-12 Abstract The Incident Object Description Exchange Format defined in RFC 7970 provides an information model and a corresponding XML data model for exchanging incident and indicator information. This draft gives implementers and operators an alternative format to exchange the same information by defining an alternative data model implementation in JSON and its encoding in CBOR. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on June 26, 2020. Copyright Notice Copyright (c) 2019 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect Takahashi, et al. Expires June 26, 2020 [Page 1] Internet-Draft JSON-IODEF December 2019 to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3 2. IODEF Data Types . . . . . . . . . . . . . . . . . . . . . . 3 2.1. Abstract Data Type to JSON Data Type Mapping . . . . . . 3 2.2. Complex JSON Types . . . . . . . . . . . . . . . . . . . 5 2.2.1. Integer . . . . . . . . . . . . . . . . . . . . . . . 5 2.2.2. Multilingual Strings . . . . . . . . . . . . . . . . 5 2.2.3. Enum . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.4. Software and Software Reference . . . . . . . . . . . 6 2.2.5. Structured Information . . . . . . . . . . . . . . . 6 2.2.6. EXTENSION . . . . . . . . . . . . . . . . . . . . . . 7 3. IODEF JSON Data Model . . . . . . . . . . . . . . . . . . . . 7 3.1. Classes and Elements . . . . . . . . . . . . . . . . . . 7 3.2. Mapping between JSON and XML IODEF . . . . . . . . . . . 17 4. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.1. Minimal Example . . . . . . . . . . . . . . . . . . . . . 19 4.2. Indicators from a Campaign . . . . . . . . . . . . . . . 21 5. The IODEF Data Model (CDDL) . . . . . . . . . . . . . . . . . 25 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 41 7. Security Considerations . . . . . . . . . . . . . . . . . . . 41 8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 41 9. References . . . . . . . . . . . . . . . . . . . . . . . . . 41 9.1. Normative References . . . . . . . . . . . . . . . . . . 41 9.2. Informative References . . . . . . . . . . . . . . . . . 42 Appendix A. Data Types used in this document . . . . . . . . . . 42 Appendix B. The IODEF Data Model (JSON Schema) . . . . . . . . . 42 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 71 1. Introduction The Incident Object Description Exchange Format (IODEF) [RFC7970] defines a data representation for security incident reports and indicators commonly exchanged by operational security teams. It facilitates the automated exchange of this information to enable mitigation and watch-and-warning. Section 3 of [RFC7970] defined an information model using Unified Modeling Language (UML) and a corresponding Extensible Markup Language (XML) schema data model in Section 8. This UML-based information model and XML-based data model are referred to as IODEF UML and IODEF XML, respectively in this document. Takahashi, et al. Expires June 26, 2020 [Page 2] Internet-Draft JSON-IODEF December 2019 IODEF documents are structured and thus suitable for machine processing. They will streamline incident response operations. Another well-used and structured format that is suitable for machine processing is JavaScript Object Notation (JSON) [RFC8259]. To facilitate the automation of incident response operations, IODEF documents and implementations should support JSON representation and it encoding in Concise Binary Object Representation (CBOR) [RFC7049]. This document defines an alternate implementation of the IODEF UML information model by specifying a JavaScript Object Notation (JSON) data model using Concise Data Definition Language (CDDL) [RFC8610] and JSON Schema [jsonschema]. This JSON data model is referred to as IODEF JSON in this document. IODEF JSON provides all of the expressivity of IODEF XML. It gives implementers and operators an alternative format to exchange the same information. The normative IODEF JSON data model is found in Section 5. Section 2 and Section 3 describe the data types and elements of this data model. Section 4 provides examples. 1.1. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119][RFC8174] when, and only when, they appear in all capitals, as shown here. 2. IODEF Data Types IODEF JSON implements the abstract data types specified in Section 2 of [RFC7970]. 2.1. Abstract Data Type to JSON Data Type Mapping IODEF JSON uses native and derived JSON data types. Figure 1 describes the mapping between the abstract data types in Section 2 of [RFC7970] and their corresponding implementations in IODEF JSON. Takahashi, et al. Expires June 26, 2020 [Page 3] Internet-Draft JSON-IODEF December 2019 +-----------------+-------------------+-------------------------------+ | IODEF Data Type | [RFC7970] | JSON Data Type | | | Reference | | +-----------------+-------------------+-------------------------------+ | INTEGER | Section 2.1 | integer, see Section 2.2.1 | | REAL | Section 2.2 | "number" per [RFC8259] | | CHARACTER | Section 2.3 | "string" per [RFC8259] | | STRING | Section 2.3 | "string" per [RFC8259] | | ML_STRING | Section 2.4 | see Section 2.2.2 | | BYTE | Section 2.5.1 | "string" per [RFC8259] | | BYTE[] | Section 2.5.1 | "string" per [RFC8259] | | HEXBIN | Section 2.5.2 | "string" per [RFC8259] | | HEXBIN[] | Section 2.5.2 | "string" per [RFC8259] | | ENUM | Section 2.6 | see Section 2.2.3 | | DATETIME | Section 2.7 | "string" per [RFC8259] | | TIMEZONE | Section 2.8 | "string" per [RFC8259] | | PORTLIST | Section 2.9 | "string" per [RFC8259] | | POSTAL | Section 2.10 | ML_STRING, Section 2.2.2 | | PHONE | Section 2.11 | "string" per [RFC8259] | | EMAIL | Section 2.12 | "string" per [RFC8259] | | URL | Section 2.13 | "string" per [RFC8259] | | ID | Section 2.14 | "string" per [RFC8259] | | IDREF | Section 2.14 | "string" per [RFC8259] | | SOFTWARE | Section 2.15 | see Section 2.2.4 | | STRUCTUREDINFO | [RFC 7203] | see Section 2.2.5 | | EXTENSION | Section 2.16 | see Section 2.2.6 | +-----------------+-------------------+-------------------------------+ Figure 1: JSON Data Types Takahashi, et al. Expires June 26, 2020 [Page 4] Internet-Draft JSON-IODEF December 2019 +-----------------+------------------+---------------------------------+ | IODEF Data Type | CBOR Data Type | CDDL prelude | | | | [RFC8610] | +-----------------+------------------+---------------------------------+ | INTEGER | 0, 1, 6 tag 2, | integer | | | 6 tag 3 | | | REAL | 7 bits 26 | float32 | | CHARACTER | 3 | text | | STRING | 3 | text | | ML_STRING | 5 | Maps/Structs (Section 3.5.1) | | BYTE | 6 tag 22 | eb64legacy | | BYTE[] | 6 tag 22 | eb64legacy | | HEXBIN | 2 | bytes | | HEXBIN[] | 2 | bytes | | ENUM | - | Choices (Section 2.2.2) | | DATETIME | 6 tag 0 | tdate | | TIMEZONE | 3 | text | | PORTLIST | 3 | text | | POSTAL | 3 | ML_STRING (Section 2.2.1) | | PHONE | 3 | text | | EMAIL | 3 | text | | URL | 6 tag 32 | uri | | ID | 3 | text | | IDREF | 3 | text | | SOFTWARE | 5 | Maps/Structs (Section 3.5.1) | | STRUCTUREDINFO | 5 | Maps/Structs (Section 3.5.1) | | EXTENSION | 5 | Maps/Structs (Section 3.5.1) | +-----------------+------------------+---------------------------------+ Figure 2: CBOR Data Types 2.2. Complex JSON Types 2.2.1. Integer An integer is a subset of "number" type of JSON, which represents signed digits encoded in Base 10. The definition of this integer is "[ minus ] int" in [RFC8259] Section 6 manner. 2.2.2. Multilingual Strings A string that needs to be represented in a human-readable language different from the default encoding of the document is represented in the information model by the ML_STRING data type. This data type is implemented as either an object with "value", "lang", and "translation-id" elements or a text string as defined in Section 5. An example is shown below. Takahashi, et al. Expires June 26, 2020 [Page 5] Internet-Draft JSON-IODEF December 2019 "MLStringType": { "value": "free-form text", # STRING "lang": "en", # ENUM "translation-id": "jp2en0023" # STRING } Note that in figures throughout this document, some supplementary information follows "#", but these are not valid syntax in JSON, but are intended to facilitate reader understanding. 2.2.3. Enum Enum is an ordered list of acceptable string values. Each value has a representative keyword. Within the data model, the enumerated type keywords are used as attribute values. 2.2.4. Software and Software Reference A particular version of software is represented in the information model by the SOFTWARE data type. This software can be described by using a reference, a Uniform Resource Locator (URL) [RFC3986], or with free-form text. The SOFTWARE data type is implemented as an object with "SoftwareReference", "URL", and "Description" elements as defined in Section 5. Examples are shown below. "SoftwareType": { "SoftwareReference": {...}, # SoftwareReference "Description": ["MS Windows"] # STRING } SoftwareReference class is a reference to a particular version of software. Examples are shown below. "SoftwareReference": { "value": "cpe:/a:google:chrome:59.0.3071.115", # STRING "spec-name": "cpe", # ENUM "dtype": "string" # ENUM } 2.2.5. Structured Information Information provided in a form of structured string, such as ID, or structured information, such as XML documents, is represented in the information model by the STRUCTUREDINFO data type. Note that this type was originally specified in Section 4.4 of [RFC7203] as a basic structure of its extension classes. The STRUCTUREDINFO data type is implemented as an object with "SpecID", "ext-SpecID", "ContentID", Takahashi, et al. Expires June 26, 2020 [Page 6] Internet-Draft JSON-IODEF December 2019 "RawData", and "Reference" elements. An example for embedding a structured ID is shown below. "StructuredInfo": { "SpecID": "urn:ietf:params:xml:ns:mile:cwe:3.3", # ENUM "ContentID": "CWE-89" # STRING } When embedding the raw data, base64 encoding defined in Section 4 of [RFC4648] SHOULD be used for encoding the data, as shown below. "StructuredInfo": { "SpecID": "urn:ietf:params:xml:ns:mile:mmdef:1.2", # ENUM "RawData": "<<>>" # BYTE } Note that the structure of this information is not interpreted in the IODEF JSON, and the word 'structured' indicates that the data item has internal structure that is intended to be processed outside of the IODEF framework. 2.2.6. EXTENSION Information not otherwise represented in the IODEF can be added using the EXTENSION data type. This data type is a generic extension mechanism. The EXTENSION data type is implemented as an ExtensionType object with "value", "name", "dtype", "ext-dtype", "meaning", "formatid", "restriction", "ext-restriction", and "observable-id" elements. An example for embedding a structured ID is shown below. "ExtensionType": { "value": "xxxxxxx", # STRING "name": "Syslog", # STRING "dtype": "string", # ENUM "meaning": "Syslog from the security appliance X" # STRING } 3. IODEF JSON Data Model 3.1. Classes and Elements The following table shows the list of IODEF Classes, their elements, and the corresponding section in [RFC7970]. Note that the complete JSON schema is defined in Section 5 using CDDL. +-----------------------------+--------------------+---------------+ | IODEF Class | Class | Corresponding | Takahashi, et al. Expires June 26, 2020 [Page 7] Internet-Draft JSON-IODEF December 2019 | | Elements and | Section | | | Attribute | in [RFC7970] | +-----------------------------+--------------------+---------------+ | IODEF-Document | version | 3.1 | | | lang? | | | | format-id? | | | | private-enum-name? | | | | private-enum-id? | | | | Incident+ | | | | AdditionalData* | | +-----------------------------+--------------------+---------------+ | Incident | purpose | 3.2 | | | ext-purpose? | | | | status? | | | | ext-status? | | | | lang? | | | | restriction? | | | | ext-restriction? | | | | observable-id? | | | | IncidentID | | | | AlternativeID? | | | | RelatedActivity* | | | | DetectTime? | | | | StartTime? | | | | EndTime? | | | | RecoveryTime? | | | | ReportTime? | | | | GenerationTime | | | | Description* | | | | Discovery* | | | | Assessment* | | | | Method* | | | | Contact+ | | | | EventData* | | | | Indicator* | | | | History? | | | | AdditionalData* | | +-----------------------------+--------------------+---------------+ | IncidentID | id | 3.4 | | | name | | | | instance? | | | | restriction? | | | | ext-restriction? | | +-----------------------------+--------------------+---------------+ | AlternativeID | restriction? | 3.5 | | | ext-restriction? | | | | IncidentID+ | | +-----------------------------+--------------------+---------------+ Takahashi, et al. Expires June 26, 2020 [Page 8] Internet-Draft JSON-IODEF December 2019 | RelatedActivity | restriction? | 3.6 | | | ext-restriction? | | | | IncidentID* | | | | URL* | | | | ThreatActor* | | | | Campaign* | | | | IndicatorID* | | | | Confidence? | | | | Description* | | | | AdditionalData* | | +-----------------------------+--------------------+---------------+ | ThreatActor | restriction? | 3.7 | | | ext-restriction? | | | | ThreatActorID* | | | | URL* | | | | Description* | | | | AdditionalData* | | +-----------------------------+--------------------+---------------+ | Campaign | restriction? | | | | ext-restriction? | | | | CampaignID* | | | | URL* | | | | Description* | | | | AdditionalData* | 3.8 | +-----------------------------+--------------------+---------------+ | Contact | role | | | | ext-role? | | | | type | | | | ext-type? | | | | restriction? | | | | ext-restriction? | | | | ContactName*, | | | | ContactTitle* | | | | Description* | | | | RegistryHandle* | | | | PostalAddress* | | | | Email* | | | | Telephone* | | | | Timezone? | | | | Contact* | | | | AdditionalData* | 3.9 | +-----------------------------+--------------------+---------------+ | RegistryHandle | handle | | | | registry | | | | ext-registry? | 3.9.1 | +-----------------------------+--------------------+---------------+ | PostalAddress | type? | | | | ext-type? | | Takahashi, et al. Expires June 26, 2020 [Page 9] Internet-Draft JSON-IODEF December 2019 | | PAddress | | | | Description* | 3.9.2 | +-----------------------------+--------------------+---------------+ | Email | type? | | | | ext-type? | | | | EmailTo | | | | Description* | 3.9.3 | +-----------------------------+--------------------+---------------+ | Telephone | type? | | | | ext-type? | | | | TelephoneNumber | | | | Description* | 3.9.4 | +-----------------------------+--------------------+---------------+ | Discovery | source? | | | | ext-source? | | | | restriction? | | | | ext-restriction? | | | | Description* | | | | Contact* | | | | DetectionPattern* | 3.10 | +-----------------------------+--------------------+---------------+ | DetectionPattern | restriction? | 3.10.1 | | | ext-restriction? | | | | observable-id? | | | | Application | | | | Description* | | | | DetectionConfiguration* | | +-----------------------------+--------------------+---------------+ | Method | restriction? | | | | ext-restriction? | | | | Reference* | | | | Description* | | | | AttackPattern* | | | | Vulnerability* | | | | Weakness* | | | | AdditionalData* | 3.11 | +-----------------------------+--------------------+---------------+ | Weakness (TBD) | restriction? | | | | ext-restriction? | | +-----------------------------+--------------------+---------------+ | Reference | observable-id? | | | | ReferenceName? | | | | URL* | | | | Description* | 3.11.1 | +-----------------------------+--------------------+---------------+ | Assessment | occurence? | | | | restriction? | | | | ext-restriction? | | Takahashi, et al. Expires June 26, 2020 [Page 10] Internet-Draft JSON-IODEF December 2019 | | observable-id? | | | | IncidentCategory* | | | | SystemImpact* | | | | BusinessImpact* | | | | TimeImpact* | | | | MonetaryImpact* | | | | IntendedImpact* | | | | Counter* | | | | MitigatingFactor* | | | | Cause* | | | | Confidence? | | | | AdditionalData* | 3.12 | +-----------------------------+--------------------+---------------+ | SystemImpact | severity? | | | | completion? | | | | type | | | | ext-type? | | | | Description* | 3.12.1 | +-----------------------------+--------------------+---------------+ | BusinessImpact | severity? | | | | ext-severity? | | | | type | | | | ext-type? | | | | Description* | 3.12.2 | +-----------------------------+--------------------+---------------+ | TimeImpact | value | | | | severity? | | | | metric | | | | ext-metric? | | | | duration? | | | | ext-duration? | 3.12.3 | +-----------------------------+--------------------+---------------+ | MonetaryImpact | value | | | | severity? | | | | currency? | 3.12.4 | +-----------------------------+--------------------+---------------+ | Confidence | value | | | | rating | | | | ext-rating? | 3.12.5 | +-----------------------------+--------------------+---------------+ | History | restriction? | | | | ext-restriction? | | | | HistoryItem+ | 3.13 | +-----------------------------+--------------------+---------------+ | HistoryItem | action | | | | ext-action? | | | | restriction? | | | | ext-restriction? | | Takahashi, et al. Expires June 26, 2020 [Page 11] Internet-Draft JSON-IODEF December 2019 | | observable-id? | | | | DateTime | | | | IncidentID? | | | | Contact? | | | | Description* | | | | DefinedCOA* | | | | AdditionalData* | 3.13.1 | +-----------------------------+--------------------+---------------+ | EventData | restriction? | | | | ext-restriction? | | | | observable-id? | | | | Description* | | | | DetectTime? | | | | StartTime? | | | | EndTime? | | | | RecoveryTime? | | | | ReportTime? | | | | Contact* | | | | Discovery* | | | | Assessment? | | | | Method* | | | | System* | | | | Expectation* | | | | RecordData* | | | | EventData* | | | | AdditionalData* | 3.14 | +-----------------------------+--------------------+---------------+ | Expectation | action? | | | | ext-action? | | | | severity? | | | | restriction? | | | | ext-restriction? | | | | observable-id? | | | | Description* | | | | DefinedCOA* | | | | StartTime? | | | | EndTime? | | | | Contact? | 3.15 | +-----------------------------+--------------------+---------------+ | System | category? | | | | ext-category? | | | | interface? | | | | spoofed? | | | | virtual? | | | | ownership? | | | | ext-ownership? | | | | restriction? | | | | ext-restriction? | | Takahashi, et al. Expires June 26, 2020 [Page 12] Internet-Draft JSON-IODEF December 2019 | | Node | | | | NodeRole* | | | | Service* | | | | OperatingSystem* | | | | Counter* | | | | AssetID* | | | | Description* | | | | AdditionalData* | 3.17 | +-----------------------------+--------------------+---------------+ | Node | DomainData* | | | | Address* | | | | PostalAddress? | | | | Location* | | | | Counter* | 3.18 | +-----------------------------+--------------------+---------------+ | Address | value | | | | category | | | | ext-category? | | | | vlan-name? | | | | vlan-num? | | | | observable-id? | 3.18.1 | +-----------------------------+--------------------+---------------+ | NodeRole | category | | | | ext-category? | | | | Description* | 3.18.2 | +-----------------------------+--------------------+---------------+ | Counter | value | | | | type | | | | ext-type? | | | | unit | | | | ext-unit? | | | | meaning? | | | | duration? | | | | ext-duration? | 3.18.3 | +-----------------------------+--------------------+---------------+ | DomainData | system-status | | | | ext-system-status? | | | | domain-status | | | | ext-domain-status? | | | | observable-id? | | | | Name | | | | DateDomainWasChecked?| | | | RegistrationDate? | | | | ExpirationDate? | | | | RelatedDNS* | | | | Nameservers* | | | | DomainContacts? | 3.19 | +-----------------------------+--------------------+---------------+ Takahashi, et al. Expires June 26, 2020 [Page 13] Internet-Draft JSON-IODEF December 2019 | Nameserver | Server | | | | Address* | 3.19.1 | +-----------------------------+--------------------+---------------+ | DomainContacts | SameDomainContact? | | | | Contact+ | 3.19.2 | +-----------------------------+--------------------+---------------+ | Service | ip-protocol? | | | | observable-id? | | | | ServiceName? | | | | Port? | | | | Portlist? | | | | ProtoCode? | | | | ProtoType? | | | | ProtoField? | | | | ApplicationHeaderField*| | | | EmailData? | | | | Application? | 3.20 | +-----------------------------+--------------------+---------------+ | ServiceName | IANAService? | | | | URL* | | | | Description* | 3.20.1 | +-----------------------------+--------------------+---------------+ | EmailData | observable-id? | | | | EmailTo* | | | | EmailFrom? | | | | EmailSubject? | | | | EmailX-Mailer? | | | | EmailHeaderField* | | | | EmailHeaders? | | | | EmailBody? | | | | EmailMessage? | | | | HashData* | | | | Signature* | 3.21 | +-----------------------------+--------------------+---------------+ | RecordData | restriction? | | | | ext-restriction? | | | | observable-id? | | | | DateTime? | | | | Description* | | | | Application? | | | | RecordPattern* | | | | RecordItem* | | | | URL* | | | | FileData* | | | | WindowsRegistryKeysModified*| | | | CertificateData* | | | | AdditionalData* | 3.22.1 | +-----------------------------+--------------------+---------------+ Takahashi, et al. Expires June 26, 2020 [Page 14] Internet-Draft JSON-IODEF December 2019 | RecordPattern | type | | | | ext-type? | | | | offset? | | | | offsetunit? | | | | ext-offsetunit? | | | | instance? | | | | value | 3.22.2 | +-----------------------------+--------------------+---------------+ | WindowsRegistryKeysModified | observable-id? | 3.23 | | | Key+ | | +-----------------------------+--------------------+---------------+ | Key | registryaction? | | | | ext-registryaction?| | | | observable-id? | | | | KeyName | | | | KeyValue? | 3.23.1 | +-----------------------------+--------------------+---------------+ | CertificateData | restriction? | | | | ext-restriction? | | | | observable-id? | | | | Certificate+ | 3.24 | +-----------------------------+--------------------+---------------+ | Certificate | observable-id? | | | | X509Data | | | | Description* | 3.24.1 | +-----------------------------+--------------------+---------------+ | FileData | restriction? | | | | ext-restriction? | | | | observable-id? | | | | File+ | 3.25 | +-----------------------------+--------------------+---------------+ | File | observable-id? | | | | FileName? | | | | FileSize? | | | | FileType? | | | | URL* | | | | HashData? | | | | Signature* | | | | AssociatedSoftware?| | | | FileProperties* | 3.25.1 | +-----------------------------+--------------------+---------------+ | HashData | scope | | | | HashTargetID? | | | | Hash* | | | | FuzzyHash* | 3.26 | +-----------------------------+--------------------+---------------+ | Hash | DigestMethod | | | | DigestValue | | Takahashi, et al. Expires June 26, 2020 [Page 15] Internet-Draft JSON-IODEF December 2019 | | CanonicalizationMethod?| | | | Application? | 3.26.1 | +-----------------------------+--------------------+---------------+ | FuzzyHash | FuzzyHashValue+ | | | | Application? | | | | AdditionalData* | 3.26.2 | +-----------------------------+--------------------+---------------+ | Indicator | restriction? | | | | ext-restriction? | | | | IndicatorID | | | | AlternativeIndicatorID*| | | | Description* | | | | StartTime? | | | | EndTime? | | | | Confidence? | | | | Contact* | | | | Observable? | | | | uid-ref? | | | | IndicatorExpression?| | | | IndicatorReference?| | | | NodeRole* | | | | AttackPhase* | | | | Reference* | | | | AdditionalData* | 3.29 | +-----------------------------+--------------------+---------------+ | IndicatorID | id | | | | name | | | | version | 3.29.1 | +-----------------------------+--------------------+---------------+ | AlternativeIndicatorID | restriction? | | | | ext-restriction? | | | | IndicatorID+ | 3.29.2 | +-----------------------------+--------------------+---------------+ | Observable | restriction? | | | | ext-restriction? | | | | System? | | | | Address? | | | | DomainData? | | | | Service? | | | | EmailData? | | | | WindowsRegistryKeysModified?| | | | FileData? | | | | CertificateData? | | | | RegistryHandle? | | | | RecordData? | | | | EventData? | | | | Incident? | | | | Expectation? | | Takahashi, et al. Expires June 26, 2020 [Page 16] Internet-Draft JSON-IODEF December 2019 | | Reference? | | | | Assessment? | | | | DetectionPattern? | | | | HistoryItem? | | | | BulkObservable? | | | | AdditionalData* | 3.29.3 | +-----------------------------+--------------------+---------------+ | BulkObservable | type? | | | | ext-type? | | | | BulkObservableFormat?| | | | BulkObservableList | | | | AdditionalData* | 3.29.4 | +-----------------------------+--------------------+---------------+ | BulkObservableFormat | Hash? | | | | AdditionalData* | 3.29.5 | +-----------------------------+--------------------+---------------+ | IndicatorExpression | operator? | | | | ext-operator? | | | | IndicatorExpression*| | | | Observable* | | | | uid-ref* | | | | IndicatorReference*| | | | Confidence? | | | | AdditionalData* | 3.29.6 | +-----------------------------+--------------------+---------------+ | IndicatorReference | uid-ref? | | | | euid-ref? | | | | version? | 3.29.7 | +-----------------------------+--------------------+---------------+ | AttackPhase | AttackPhaseID* | | | | URL* | | | | Description* | | | | AdditionalData* | 3.29.8 | +-----------------------------+--------------------+---------------+ Figure 3: IODEF Classes 3.2. Mapping between JSON and XML IODEF o Attributes and elements of each class in XML IODEF document are both presented as JSON attributes in JSON IODEF document, and the order of their appearances is ignored. o Flow class is deleted, and classes with its instances now directly have instances of EventData class that used to belong to the Flow class. Takahashi, et al. Expires June 26, 2020 [Page 17] Internet-Draft JSON-IODEF December 2019 o ApplicationHeader class is deleted, and classes with its instances now directly have instances of ApplicationHeaderField class that used to belong to the ApplicationHeader class. o SignatureData class is deleted, and classes with its instances now directly have instance of Signature class that used to belong to the SignatureData class. o IndicatorData class is deleted, and classes with its instances now directly have the instances of Indicator class that used to belong to the IndicatorData class. o ObservableReference class is deleted, and classes with its instances now directly have uid-ref as an element. o Record class is deleted, and classes with its instances now directly have the instances of RecordData class that used to belong to the Record class. o The MLStringType were modified to support simple string by allowing the type to have not only a predefined object type but also text type, in order to allow simple descriptions of elements of the type. o The elements of ML_STRING type in XML IODEF document are presented as either STRING type or ML_STRING type in JSON IODEF document. o Data models of the extension classes defined by [RFC7203] and referenced by [RFC7970] are represented by StructuredInfo class defined in this document. o Signature, X509Data, and RawData are encoded with base64 and are represented as string (BYTE type) in JSON IODEF documents. o EmailBody represents an whole message body including MIME structure in the same manner defined in [RFC7970]. In case of an email composed of MIME multipart, the EmailBody contains multiple body parts separated by boundary strings. o The "ipv6-net-mask" type attribute of BulkObservable class remains available for the backward compatibility purpose, but the use of this attribute is not recommended because IPV6 does not use netmask any more. o ENUM values in this document is extensible and is managed by IANA, as with [RFC7970]. Takahashi, et al. Expires June 26, 2020 [Page 18] Internet-Draft JSON-IODEF December 2019 4. Examples This section provides examples of IODEF documents. These examples do not represent the full capabilities of the data model or the only way to encode particular information. 4.1. Minimal Example A document containing only the mandatory elements and attributes is shown below in JSON and CBOR, respectively. { "version": "2.0", "lang": "en", "Incident": [{ "purpose": "reporting", "restriction": "private", "IncidentID": { "id": "492382", "name": "csirt.example.com" }, "GenerationTime": "2015-07-18T09:00:00-05:00", "Contact": [{ "type": "organization", "role": "creator", "Email": [{"EmailTo": "contact@csirt.example.com"}] }] }] } Figure 4: A Minimal Example in JSON A3 # map(3) 67 # text(7) 76657273696F6E # "version" 63 # text(3) 322E30 # "2.0" 64 # text(4) 6C616E67 # "lang" 62 # text(2) 656E # "en" 68 # text(8) 496E636964656E74 # "Incident" 81 # array(1) A5 # map(5) 67 # text(7) 707572706F7365 # "purpose" 69 # text(9) Takahashi, et al. Expires June 26, 2020 [Page 19] Internet-Draft JSON-IODEF December 2019 7265706F7274696E67 # "reporting" 6B # text(11) 7265737472696374696F6E # "restriction" 67 # text(7) 70726976617465 # "private" 6A # text(10) 496E636964656E744944 # "IncidentID" A2 # map(2) 62 # text(2) 6964 # "id" 66 # text(6) 343932333832 # "492382" 64 # text(4) 6E616D65 # "name" 71 # text(17) 63736972742E6578616D706C652E636F6D # "csirt.example.com" 6E # text(14) 47656E65726174696F6E54696D65 # "GenerationTime" C0 # tag(0) 78 19 # text(25) 323031352D30372D31385430393A30303A30302D30353A3030 # "2015-07-18T09:00:00-05:00" 67 # text(7) 436F6E74616374 # "Contact" 81 # array(1) A3 # map(3) 64 # text(4) 74797065 # "type" 6C # text(12) 6F7267616E697A6174696F6E # "organization" 64 # text(4) 726F6C65 # "role" 67 # text(7) 63726561746F72 # "creator" 65 # text(5) 456D61696C # "Email" 81 # array(1) A1 # map(1) 67 # text(7) 456D61696C546F # "EmailTo" 78 19 # text(25) 636F6E746163744063736972742E6578616D706C652E636F6D # "contact@csirt.example.com" Figure 5: A Minimal Example in CBOR Takahashi, et al. Expires June 26, 2020 [Page 20] Internet-Draft JSON-IODEF December 2019 4.2. Indicators from a Campaign An example of C2 domains from a given campaign is shown below in JSON and CBOR, respectively. { "version": "2.0", "lang": "en", "Incident": [{ "purpose": "watch", "restriction": "green", "IncidentID": { "id": "897923", "name": "csirt.example.com" }, "RelatedActivity": [{ "ThreatActor": [{ "ThreatActorID": ["TA-12-AGGRESSIVE-BUTTERFLY"], "Description": ["Aggressive Butterfly"]}], "Campaign": [{ "CampaignID": ["C-2015-59405"], "Description": ["Orange Giraffe"] }] }], "GenerationTime": "2015-10-02T11:18:00-05:00", "Description": ["Summarizes the Indicators of Compromise for the Orange Giraffe campaign of the Aggressive Butterfly crime gang."], "Assessment": [{ "Impact": [{"BusinessImpact": {"type": "breach-proprietary"}}] }], "Contact": [{ "type": "organization", "role": "creator", "ContactName": ["CSIRT for example.com"], "Email": [{ "EmailTo": "contact@csirt.example.com" }] }], "Indicator": [{ "IndicatorID": { "id": "G90823490", "name": "csirt.example.com", "version": "1" }, "Description": ["C2 domains"], "StartTime": "2014-12-02T11:18:00-05:00", "Observable": { "BulkObservable": { Takahashi, et al. Expires June 26, 2020 [Page 21] Internet-Draft JSON-IODEF December 2019 "type": "domain-name", "BulkObservableList": "kj290023j09r34.example.com"} } }] }] } Figure 6: Indicators from a Campaign in JSON A3 # map(3) 67 # text(7) 76657273696F6E # "version" 63 # text(3) 322E30 # "2.0" 64 # text(4) 6C616E67 # "lang" 62 # text(2) 656E # "en" 68 # text(8) 496E636964656E74 # "Incident" 81 # array(1) A9 # map(9) 67 # text(7) 707572706F7365 # "purpose" 65 # text(5) 7761746368 # "watch" 6B # text(11) 7265737472696374696F6E # "restriction" 65 # text(5) 677265656E # "green" 6A # text(10) 496E636964656E744944 # "IncidentID" A2 # map(2) 62 # text(2) 6964 # "id" 66 # text(6) 383937393233 # "897923" 64 # text(4) 6E616D65 # "name" 71 # text(17) 63736972742E6578616D706C652E636F6D # "csirt.example.com" 6F # text(15) 52656C617465644163746976697479 # "RelatedActivity" 81 # array(1) A2 # map(2) 6B # text(11) 5468726561744163746F72 # "ThreatActor" 81 # array(1) Takahashi, et al. Expires June 26, 2020 [Page 22] Internet-Draft JSON-IODEF December 2019 A2 # map(2) 6D # text(13) 5468726561744163746F724944 # "ThreatActorID" 81 # array(1) 78 1A # text(26) 54412D31322D414747524553534956452D425554544552464 C59 # "TA-12-AGGRESSIVE-BUTTERFLY" 6B # text(11) 4465736372697074696F6E # "Description" 81 # array(1) 74 # text(20) 4167677265737369766520427574746572666C79 # "Aggressive Butterfly" 68 # text(8) 43616D706169676E # "Campaign" 81 # array(1) A2 # map(2) 6A # text(10) 43616D706169676E4944 # "CampaignID" 81 # array(1) 6C # text(12) 432D323031352D3539343035 # "C-2015-59405" 6B # text(11) 4465736372697074696F6E # "Description" 81 # array(1) 6E # text(14) 4F72616E67652047697261666665 # "Orange Giraffe" 6E # text(14) 47656E65726174696F6E54696D65 # "GenerationTime" C0 # tag(0) 78 19 # text(25) 323031352D31302D30325431313A31383A30302D30353A3030 # "2015-10-02T11:18:00-05:00" 6B # text(11) 4465736372697074696F6E # "Description" 81 # array(1) 78 6F # text(111) 53756D6D6172697A65732074686520496E64696361746F7273206F6620436 F6D70726F6D69736520666F7220746865204F72616E676520476972616666 652063616D706169676E206F6620746865204167677265737369766520427 574746572666C79206372696D652067616E672E # "Summarizes the Indicators of Compromise for the Orange Giraffe campaign of the Aggressive Butterfly crime gang." 6A # text(10) 4173736573736D656E74 # "Assessment" 81 # array(1) A1 # map(1) 66 # text(6) Takahashi, et al. Expires June 26, 2020 [Page 23] Internet-Draft JSON-IODEF December 2019 496D70616374 # "Impact" 81 # array(1) A1 # map(1) 6E # text(14) 427573696E657373496D70616374 # "BusinessImpact" A1 # map(1) 64 # text(4) 74797065 # "type" 72 # text(18) 6272656163682D70726F7072696574617279 # "breach-proprietary" 67 # text(7) 436F6E74616374 # "Contact" 81 # array(1) A4 # map(4) 64 # text(4) 74797065 # "type" 6C # text(12) 6F7267616E697A6174696F6E # "organization" 64 # text(4) 726F6C65 # "role" 67 # text(7) 63726561746F72 # "creator" 6B # text(11) 436F6E746163744E616D65 # "ContactName" 81 # array(1) 75 # text(21) 435349525420666F72206578616D706C652E636F6D # "CSIRT for example.com" 65 # text(5) 456D61696C # "Email" 81 # array(1) A1 # map(1) 67 # text(7) 456D61696C546F # "EmailTo" 78 19 # text(25) 636F6E746163744063736972742E6578616D706C652E636F6D # "contact@csirt.example.com" 69 # text(9) 496E64696361746F72 # "Indicator" 81 # array(1) A4 # map(4) 6B # text(11) 496E64696361746F724944 # "IndicatorID" A3 # map(3) 62 # text(2) 6964 # "id" 69 # text(9) Takahashi, et al. Expires June 26, 2020 [Page 24] Internet-Draft JSON-IODEF December 2019 473930383233343930 # "G90823490" 64 # text(4) 6E616D65 # "name" 71 # text(17) 63736972742E6578616D706C652E636F6D # "csirt.example.com" 67 # text(7) 76657273696F6E # "version" 61 # text(1) 31 # "1" 6B # text(11) 4465736372697074696F6E # "Description" 81 # array(1) 6A # text(10) 433220646F6D61696E73 # "C2 domains" 69 # text(9) 537461727454696D65 # "StartTime" C0 # tag(0) 78 19 # text(25) 323031342D31322D30325431313A31383A30302D30353A3030 # "2014-12-02T11:18:00-05:00" 6A # text(10) 4F627365727661626C65 # "Observable" A1 # map(1) 6E # text(14) 42756C6B4F627365727661626C65 # "BulkObservable" A2 # map(2) 64 # text(4) 74797065 # "type" 6B # text(11) 646F6D61696E2D6E616D65 # "domain-name" 72 # text(18) 42756C6B4F627365727661626C654C697374 # "BulkObservableList" 78 1A # text(26) 6B6A3239303032336A30397233342E6578616D706C652E636F6D # "kj290023j09r34.example.com" Figure 7: Indicators from a Campaign in CBOR 5. The IODEF Data Model (CDDL) start = iodef ;;; iodef.json: IODEF-Document iodef = { version: text Takahashi, et al. Expires June 26, 2020 [Page 25] Internet-Draft JSON-IODEF December 2019 ? lang: lang ? format-id: text ? private-enum-name: text ? private-enum-id: text Incident: [+ Incident] ? AdditionalData: [+ ExtensionType] } duration = "second" / "minute" / "hour" / "day" / "month" / "quarter" / "year" / "ext-value" lang = "" / text .regexp "[a-zA-Z]{1,8}(-[a-zA-Z0-9]{1,8})*" restriction = "public" / "partner" / "need-to-know" / "private" / "default" / "white" / "green" / "amber" / "red" / "ext-value" SpecID = "urn:ietf:params:xml:ns:mile:mmdef:1.2" / "private" IDtype = text .regexp "[a-zA-Z_][a-zA-Z0-9_.-]*" IDREFType = IDtype URLtype = uri TimeZonetype = text .regexp "Z|[\\+\\-](0[0-9]|1[0-4]):[0-5][0-9]" PortlistType = text .regexp "[0-9]+(\\-[0-9]+)?(,[0-9]+(\\-[0-9]+)?)*" action = "nothing" / "contact-source-site" / "contact-target-site" / "contact-sender" / "investigate" / "block-host" / "block-network" / "block-port" / "rate-limit-host" / "rate-limit-network" / "rate-limit-port" / "redirect-traffic" / "honeypot" / "upgrade-software" / "rebuild-asset" / "harden-asset" / "remediate-other" / "status-triage" / "status-new-info" / "watch-and-report" / "training" / "defined-coa" / "other" / "ext-value" DATETIME = tdate BYTE = eb64legacy MLStringType = { value: text ? lang: lang ? translation-id: text } / text PositiveFloatType = float32 .gt 0 PAddressType = MLStringType ExtensionType = { value: text ? name: text dtype: "boolean" / "byte" / "bytes" / "character" / "date-time" / Takahashi, et al. Expires June 26, 2020 [Page 26] Internet-Draft JSON-IODEF December 2019 "ntpstamp" / "integer" / "portlist" / "real" / "string" / "file" / "path" / "frame" / "packet" / "ipv4-packet" / "json"/ "ipv6-packet" / "url" / "csv" / "winreg" / "xml" / "ext-value" .default "string" ? ext-dtype: text ? meaning: text ? formatid: text ? restriction: restriction .default "private" ? ext-restriction: text ? observable-id: IDtype } SoftwareType = { ? SoftwareReference: SoftwareReference ? URL: [+ URLtype] ? Description: [+ MLStringType] } SoftwareReference = { ? value: text spec-name: "custom" / "cpe" / "swid" / "ext-value" ? ext-spec-name: text ? dtype: "bytes" / "integer" / "real" / "string" / "xml" / "ext-value" .default "string" ? ext-dtype: text } Incident = { purpose: "traceback" / "mitigation" / "reporting" / "watch" / "other" / "ext-value" ? ext-purpose: text ? status: "new" / "in-progress"/ "forwarded" / "resolved" / "future" / "ext-value" ? ext-status: text ? lang: lang ? restriction: restriction .default "private" ? ext-restriction: text ? observable-id: IDtype IncidentID: IncidentID ? AlternativeID: AlternativeID ? RelatedActivity: [+ RelatedActivity] ? DetectTime: DATETIME ? StartTime: DATETIME ? EndTime: DATETIME ? RecoveryTime: DATETIME ? ReportTime: DATETIME GenerationTime: DATETIME ? Description: [+ MLStringType] Takahashi, et al. Expires June 26, 2020 [Page 27] Internet-Draft JSON-IODEF December 2019 ? Discovery: [+ Discovery] ? Assessment: [+ Assessment] ? Method: [+ Method] Contact: [+ Contact] ? EventData: [+ EventData] ? Indicator: [+ Indicator] ? History: History ? AdditionalData: [+ ExtensionType] } IncidentID = { id: text name: text ? instance: text ? restriction: restriction .default "private" ? ext-restriction: text } AlternativeID = { ? restriction: restriction .default "private" ? ext-restriction: text IncidentID: [+ IncidentID] } RelatedActivity = { ? restriction: restriction .default "private" ? ext-restriction: text ? IncidentID: [+ IncidentID] ? URL: [+ URLtype] ? ThreatActor: [+ ThreatActor] ? Campaign: [+ Campaign] ? IndicatorID: [+ IndicatorID] ? Confidence: Confidence ? Description: [+ text] ? AdditionalData: [+ ExtensionType] } ThreatActor = { ? restriction: restriction .default "private" ? ext-restriction: text ? ThreatActorID: [+ text] ? URL: [+ URLtype] ? Description: [+ MLStringType] ? AdditionalData: [+ ExtensionType] } Campaign = { ? restriction: restriction .default "private" Takahashi, et al. Expires June 26, 2020 [Page 28] Internet-Draft JSON-IODEF December 2019 ? ext-restriction: text ? CampaignID: [+ text] ? URL: [+ URLtype] ? Description: [+ MLStringType] ? AdditionalData: [+ ExtensionType] } Contact = { role: "creator" / "reporter" / "admin" / "tech" / "provider" / "user" / "billing" / "legal" / "irt" / "abuse" / "cc" / "cc-irt" / "leo" / "vendor" / "vendor-support" / "victim" / "victim-notified" / "ext-value" ? ext-role: text type: "person" / "organization" / "ext-value" ? ext-type: text ? restriction: restriction .default "private" ? ext-restriction: text ? ContactName: [+ MLStringType] ? ContactTitle: [+ MLStringType] ? Description: [+ MLStringType] ? RegistryHandle: [+ RegistryHandle] ? PostalAddress: [+ PostalAddress] ? Email: [+ Email] ? Telephone: [+ Telephone] ? Timezone: TimeZonetype ? Contact: [+ Contact] ? AdditionalData: [+ ExtensionType] } RegistryHandle = { handle: text registry: "internic" / "apnic" / "arin" / "lacnic" / "ripe" / "afrinic" / "local" / "ext-value" ? ext-registry: text } PostalAddress = { ? type: "street" / "mailing" / "ext-value" ? ext-type: text PAddress: PAddressType ? Description: [+ MLStringType] } Email = { ? type: "direct" / "hotline" / "ext-value" ? ext-type: text EmailTo: text ? Description: [+ MLStringType] Takahashi, et al. Expires June 26, 2020 [Page 29] Internet-Draft JSON-IODEF December 2019 } Telephone = { ? type: "wired" / "mobile" / "fax" / "hotline" / "ext-value" ? ext-type: text TelephoneNumber: text ? Description: [+ MLStringType] } Discovery = { ? source: "nidps" / "hips" / "siem" / "av" / "third-party-monitoring" / "incident" / "os-log" / "application-log" / "device-log" / "network-flow" / "passive-dns" / "investigation" / "audit" / "internal-notification" / "external-notification" / "leo" / "partner" / "actor" / "unknown" / "ext-value" ? ext-source: text ? restriction: restriction .default "private" ? ext-restriction: text ? Description: [+ MLStringType] ? Contact: [+ Contact] ? DetectionPattern: [+ DetectionPattern] } DetectionPattern = { ? restriction: restriction .default "private" ? ext-restriction: text ? observable-id: IDtype (Description: [+ MLStringType] // DetectionConfiguration: [+ text]) Application: SoftwareType } Method = { ? restriction: restriction .default "private" ? ext-restriction: text ? Reference: [+ Reference] ? Description: [+ MLStringType] ? AttackPattern: [+ StructuredInfo] ? Vulnerability: [+ StructuredInfo] ? Weakness: [+ StructuredInfo] ? AdditionalData: [+ ExtensionType] } StructuredInfo = { SpecID: SpecID ? ext-SpecID: text ? ContentID: text ? (RawData: [+ BYTE] // Reference:[+ Reference]) ? Platform:[+ Platform] Takahashi, et al. Expires June 26, 2020 [Page 30] Internet-Draft JSON-IODEF December 2019 ? Scoring:[+ Scoring] } Platform = { SpecID: SpecID ? ext-SpecID: text ? ContentID: text ? RawData: [+ BYTE] ? Reference: [+ Reference] } Scoring = { SpecID: SpecID ? ext-SpecID: text ? ContentID: text ? RawData: [+ BYTE] ? Reference: [+ Reference] } Reference = { ? observable-id: IDtype ? ReferenceName: ReferenceName ? URL: [+ URLtype] ? Description: [+ MLStringType] } ReferenceName = { specIndex: integer ID: IDtype } Assessment = { ? occurrence: "actual" / "potential" ? restriction: restriction .default "private" ? ext-restriction: text ? observable-id: IDtype ? IncidentCategory: [+ MLStringType] Impact: [+ {SystemImpact: SystemImpact} / {BusinessImpact: BusinessImpact} / {TimeImpact: TimeImpact} / {MonetaryImpact: MonetaryImpact} / {IntendedImpact: BusinessImpact}] ? Counter: [+ Counter] ? MitigatingFactor: [+ MLStringType] ? Cause: [+ MLStringType] ? Confidence: Confidence ? AdditionalData: [+ ExtensionType] } SystemImpact = { ? severity: "low" / "medium" / "high" Takahashi, et al. Expires June 26, 2020 [Page 31] Internet-Draft JSON-IODEF December 2019 ? completion: "failed" / "succeeded" type: "takeover-account" / "takeover-service" / "takeover-system" / "cps-manipulation" / "cps-damage" / "availability-data" / "availability-account" / "availability-service" / "availability-system" / "damaged-system" / "damaged-data" / "breach-proprietary" / "breach-privacy" / "breach-credential" / "breach-configuration" / "integrity-data" / "integrity-configuration" / "integrity-hardware" / "traffic-redirection" / "monitoring-traffic" / "monitoring-host"/ "policy" / "unknown" / "ext-value" .default "unknown" ? ext-type: text ? Description: [+ MLStringType] } BusinessImpact = { ? severity:"none" / "low" / "medium" / "high" / "unknown" / "ext-value" .default "unknown" ? ext-severity: text type: "breach-proprietary" / "breach-privacy" / "breach-credential" / "loss-of-integrity" / "loss-of-service" / "theft-financial" / "theft-service" / "degraded-reputation" / "asset-damage" / "asset-manipulation" / "legal" / "extortion" / "unknown" / "ext-value" .default "unknown" ? ext-type: text ? Description: [+ MLStringType] } TimeImpact = { value: PositiveFloatType ? severity: "low" / "medium" / "high" metric: "labor" / "elapsed" / "downtime" / "ext-value" ? ext-metric: text ? duration: duration .default "hour" ? ext-duration: text } MonetaryImpact = { value: PositiveFloatType ? severity: "low" / "medium" / "high" ? currency: text } Confidence = { value: float32 rating: "low" / "medium" / "high" / "numeric" / "unknown" / "ext-value" ? ext-rating: text } Takahashi, et al. Expires June 26, 2020 [Page 32] Internet-Draft JSON-IODEF December 2019 History = { ? restriction: restriction .default "private" ? ext-restriction: text HistoryItem: [+ HistoryItem] } HistoryItem = { action: action .default "other" ? ext-action: text ? restriction: restriction .default "private" ? ext-restriction: text ? observable-id: IDtype DateTime: DATETIME ? IncidentID: IncidentID ? Contact: Contact ? Description: [+ MLStringType] ? DefinedCOA: [+ text] ? AdditionalData: [+ ExtensionType] } EventData = { ? restriction: restriction .default "default" ? ext-restriction: text ? observable-id: IDtype ? Description: [+ MLStringType] ? DetectTime: DATETIME ? StartTime: DATETIME ? EndTime: DATETIME ? RecoveryTime: DATETIME ? ReportTime: DATETIME ? Contact: [+ Contact] ? Discovery: [+ Discovery] ? Assessment: Assessment ? Method: [+ Method] ? System: [+ System] ? Expectation: [+ Expectation] ? RecordData: [+ RecordData] ? EventData: [+ EventData] ? AdditionalData: [+ ExtensionType] } Expectation = { ? action: action .default "other" ? ext-action: text ? severity: "low" / "medium" / "high" ? restriction: restriction .default "default" ? ext-restriction: text ? observable-id: IDtype Takahashi, et al. Expires June 26, 2020 [Page 33] Internet-Draft JSON-IODEF December 2019 ? Description: [+ MLStringType] ? DefinedCOA: [+ text] ? StartTime: DATETIME ? EndTime: DATETIME ? Contact: Contact } System = { ? category: "source" / "target" / "intermediate" / "sensor" / "infrastructure" / "ext-value" ? ext-category: text ? interface: text ? spoofed: "unknown" / "yes" / "no" .default "unknown" ? virtual: "yes" / "no" / "unknown" .default "unknown" ? ownership: "organization" / "personal" / "partner" / "customer" / "no-relationship" / "unknown" / "ext-value" ? ext-ownership: text ? restriction: restriction .default "private" ? ext-restriction: text ? observable-id: IDtype Node: Node ? NodeRole: [+ NodeRole] ? Service: [+ Service] ? OperatingSystem: [+ SoftwareType] ? Counter: [+ Counter] ? AssetID: [+ text] ? Description: [+ MLStringType] ? AdditionalData: [+ ExtensionType] } Node = { (DomainData:[+ DomainData] ? Address:[+ Address] // ? DomainData:[+ DomainData] Address:[+ Address]) ? PostalAddress: PostalAddress ? Location: [+ MLStringType] ? Counter: [+ Counter] } Address = { value: text category: "asn" / "atm" / "e-mail" / "ipv4-addr" / "ipv4-net" / "ipv4-net-masked" / "ipv4-net-mask" / "ipv6-addr" / "ipv6-net" / "ipv6-net-masked" / "mac" / "site-uri" / "ext-value" .default "ipv6-addr" ? ext-category: text ? vlan-name: text Takahashi, et al. Expires June 26, 2020 [Page 34] Internet-Draft JSON-IODEF December 2019 ? vlan-num: integer ? observable-id: IDtype } NodeRole = { category: "client" / "client-enterprise" / "client-partner" / "client-remote" / "client-kiosk" / "client-mobile" / "server-internal" / "server-public" / "www" / "mail" / "webmail" / "messaging" / "streaming" / "voice" / "file" / "ftp" / "p2p" / "name" / "directory" / "credential" / "print" / "application" / "database" / "backup" / "dhcp" / "assessment" / "source-control" / "config-management" / "monitoring" / "infra" / "infra-firewall" / "infra-router" / "infra-switch" / "camera" / "proxy" / "remote-access" / "log" / "virtualization" / "pos" / "scada" / "scada-supervisory" / "sinkhole" / "honeypot" / "anomyzation" / "c2-server" / "malware-distribution" / "drop-server" / "hop-point" / "reflector" / "phishing-site" / "spear-phishing-site" / "recruiting-site" / "fraudulent-site" / "ext-value" ? ext-category: text ? Description: [+ MLStringType] } Counter = { value: float32 type: "count" / "peak" / "average" / "ext-value" ? ext-type: text unit: "byte" / "mbit" / "packet" / "flow" / "session" / "alert" / "message" / "event" / "host" / "site" / "organization" / "ext-value" ? ext-unit: text ? meaning: text ? duration: duration .default "hour" ? ext-duration: text } DomainData = { system-status: "spoofed" / "fraudulent" / "innocent-hacked" / "innocent-hijacked" / "unknown" / "ext-value" ? ext-system-status: text domain-status: "reservedDelegation" / "assignedAndActive" / "assignedAndInactive" / "assignedAndOnHold" / "revoked" / "transferPending" / "registryLock" / "registrarLock" / "other" / "unknown" / "ext-value" ? ext-domain-status: text ? observable-id: IDtype Name: text Takahashi, et al. Expires June 26, 2020 [Page 35] Internet-Draft JSON-IODEF December 2019 ? DateDomainWasChecked: DATETIME ? RegistrationDate: DATETIME ? ExpirationDate: DATETIME ? RelatedDNS: [+ ExtensionType] ? NameServers: [+ NameServers] ? DomainContacts: DomainContacts } NameServers = { Server: text Address: [+ Address] } DomainContacts = { (SameDomainContact: text // Contact: [+ Contact]) } Service = { ? ip-protocol: integer ? observable-id: IDtype ? ServiceName: ServiceName ? Port: integer ? Portlist: PortlistType ? ProtoCode: integer ? ProtoType: integer ? ProtoField: integer ? ApplicationHeaderField: [+ ExtensionType] ? EmailData: EmailData ? Application: SoftwareType } ServiceName = { ? IANAService: text ? URL: [+ URLtype] ? Description: [+ MLStringType] } EmailData = { ? observable-id: IDtype ? EmailTo: [+ text] ? EmailFrom: text ? EmailSubject: text ? EmailX-Mailer: text ? EmailHeaderField: [+ ExtensionType] ? EmailHeaders: text ? EmailBody: text ? EmailMessage: text ? HashData: [+ HashData] Takahashi, et al. Expires June 26, 2020 [Page 36] Internet-Draft JSON-IODEF December 2019 ? Signature: [+ BYTE] } RecordData = { ? restriction: restriction .default "private" ? ext-restriction: text ? observable-id: IDtype ? DateTime: DATETIME ? Description: [+ MLStringType] ? Application: SoftwareType ? RecordPattern: [+ RecordPattern] ? RecordItem: [+ ExtensionType] ? URL: [+ URLtype] ? FileData: [+ FileData] ? WindowsRegistryKeysModified: [+ WindowsRegistryKeysModified] ? CertificateData: [+ CertificateData] ? AdditionalData: [+ ExtensionType] } RecordPattern = { value: text type: "regex" / "binary" / "xpath" / "ext-value" .default "regex" ? ext-type: text ? offset: integer ? offsetunit: "line" / "byte" / "ext-value" .default "line" ? ext-offsetunit: text ? instance: integer } WindowsRegistryKeysModified = { ? observable-id: IDtype Key: [+ Key] } Key = { ? registryaction: "add-key" / "add-value" / "delete-key" / "delete-value" / "modify-key" / "modify-value" / "ext-value" ? ext-registryaction: text ? observable-id: IDtype KeyName: text ? KeyValue: text } CertificateData = { ? restriction: restriction .default "private" ? ext-restriction: text ? observable-id: IDtype Takahashi, et al. Expires June 26, 2020 [Page 37] Internet-Draft JSON-IODEF December 2019 Certificate: [+ Certificate] } Certificate = { ? observable-id: IDtype X509Data: BYTE ? Description: [+ MLStringType] } FileData = { ? restriction: restriction .default "private" ? ext-restriction: text ? observable-id: IDtype File: [+ File] } File = { ? observable-id: IDtype ? FileName: text ? FileSize: integer ? FileType: text ? URL: [+ URLtype] ? HashData: HashData ? Signature: [+ BYTE] ? AssociatedSoftware: SoftwareType ? FileProperties: [+ ExtensionType] } HashData = { scope: "file-contents" / "file-pe-section" / "file-pe-iat" / "file-pe-resource" / "file-pdf-object" / "email-hash" / "email-headers-hash" / "email-body-hash" / "ext-value" ? HashTargetID: text ? Hash: [+ Hash] ? FuzzyHash: [+ FuzzyHash] } Hash = { DigestMethod: BYTE DigestValue: BYTE ? CanonicalizationMethod: BYTE ? Application: SoftwareType } FuzzyHash = { FuzzyHashValue: [+ ExtensionType] ? Application: SoftwareType ? AdditionalData: [+ ExtensionType] Takahashi, et al. Expires June 26, 2020 [Page 38] Internet-Draft JSON-IODEF December 2019 } Indicator = { ? restriction: restriction .default "private" ? ext-restriction: text IndicatorID: IndicatorID ? AlternativeIndicatorID: [+ AlternativeIndicatorID] ? Description: [+ MLStringType] ? StartTime: DATETIME ? EndTime: DATETIME ? Confidence: Confidence ? Contact: [+ Contact] (Observable: Observable // uid-ref: IDREFType // IndicatorExpression: IndicatorExpression // IndicatorReference: IndicatorReference) ? NodeRole: [+ NodeRole] ? AttackPhase: [+ AttackPhase] ? Reference: [+ Reference] ? AdditionalData: [+ ExtensionType] } IndicatorID = { id: IDtype name: text version: text } AlternativeIndicatorID = { ? restriction: restriction .default "private" ? ext-restriction: text IndicatorID: [+ IndicatorID] } Observable = { ? restriction: restriction .default "private" ? ext-restriction: text ? (System: System // Address: Address // DomainData: DomainData // EmailData: EmailData // Service: Service // WindowsRegistryKeysModified: WindowsRegistryKeysModified // FileData: FileData // CertificateData: CertificateData // RegistryHandle: RegistryHandle // RecordData: RecordData // EventData: EventData // Incident: Incident // Expectation: Expectation // Reference: Reference // Assessment: Assessment // DetectionPattern: DetectionPattern // HistoryItem: HistoryItem // BulkObservable: BulkObservable // AdditionalData: [+ ExtensionType]) } Takahashi, et al. Expires June 26, 2020 [Page 39] Internet-Draft JSON-IODEF December 2019 BulkObservable = { ? type: "asn" / "atm" / "e-mail" / "ipv4-addr" / "ipv4-net" / "ipv4-net-mask" / "ipv6-addr" / "ipv6-net" / "ipv6-net-mask" / "mac" / "site-uri" / "domain-name" / "domain-to-ipv4" / "domain-to-ipv6" / "domain-to-ipv4-timestamp" / "domain-to-ipv6-timestamp" / "ipv4-port" / "ipv6-port" / "windows-reg-key" / "file-hash" / "email-x-mailer" / "email-subject" / "http-user-agent" / "http-request-uri" / "mutex" / "file-path" / "user-name" / "ext-value" ? ext-type: text ? BulkObservableFormat: BulkObservableFormat BulkObservableList: text ? AdditionalData: [+ ExtensionType] } BulkObservableFormat = { (Hash: Hash // AdditionalData: [+ ExtensionType]) } IndicatorExpression = { ? operator: "not" / "and" / "or" / "xor" .default "and" ? ext-operator: text ? IndicatorExpression: [+ IndicatorExpression] ? Observable: [+ Observable] ? uid-ref: [+ IDREFType] ? IndicatorReference: [+ IndicatorReference] ? Confidence: Confidence ? AdditionalData: [+ ExtensionType] } IndicatorReference = { (uid-ref: IDREFType // euid-ref: text) ? version: text } AttackPhase = { ? AttackPhaseID: [+ text] ? URL: [+ URLtype] ? Description: [+ MLStringType] ? AdditionalData: [+ ExtensionType] } Figure 8: Data Model in CDDL Takahashi, et al. Expires June 26, 2020 [Page 40] Internet-Draft JSON-IODEF December 2019 6. IANA Considerations This document does not require any IANA actions. 7. Security Considerations This document does not provide any further security considerations than the one described in [RFC7970]. 8. Acknowledgments We would like to thank Henk Birkholz, Carsten Bormann, Yasuaki Morita, and Takahiko Nagata for their insightful comments on CDDL. 9. References 9.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform Resource Identifier (URI): Generic Syntax", STD 66, RFC 3986, DOI 10.17487/RFC3986, January 2005, . [RFC4648] Josefsson, S., "The Base16, Base32, and Base64 Data Encodings", RFC 4648, DOI 10.17487/RFC4648, October 2006, . [RFC7049] Bormann, C. and P. Hoffman, "Concise Binary Object Representation (CBOR)", RFC 7049, DOI 10.17487/RFC7049, October 2013, . [RFC7203] Takahashi, T., Landfield, K., and Y. Kadobayashi, "An Incident Object Description Exchange Format (IODEF) Extension for Structured Cybersecurity Information", RFC 7203, DOI 10.17487/RFC7203, April 2014, . [RFC7970] Danyliw, R., "The Incident Object Description Exchange Format Version 2", RFC 7970, DOI 10.17487/RFC7970, November 2016, . Takahashi, et al. Expires June 26, 2020 [Page 41] Internet-Draft JSON-IODEF December 2019 [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . [RFC8259] Bray, T., Ed., "The JavaScript Object Notation (JSON) Data Interchange Format", STD 90, RFC 8259, DOI 10.17487/RFC8259, December 2017, . [RFC8610] Birkholz, H., Vigano, C., and C. Bormann, "Concise Data Definition Language (CDDL): A Notational Convention to Express Concise Binary Object Representation (CBOR) and JSON Data Structures", RFC 8610, DOI 10.17487/RFC8610, June 2019, . 9.2. Informative References [jsonschema] Francis Galiegue, Kris Zyp, and Gary Court, "JSON Schema: core definitions and terminology", 2013. Appendix A. Data Types used in this document The CDDL prelude used in this document is mapped to JSON as shown in the table below. +-----------------+-------------------+----------------------------+ | CDDL Prelude | Use of JSON | Instance | Validation | +-----------------+-------------------+----------------------------+ | bytes | n/a | string | tool available | | text | string | string | unnecessary | | tdate | n/a | string | 7.3.1 date-time | | integer | n/a | number | integer | | eb64legacy | n/a | string | tool available | | uri | n/a | string | 7.3.6 uri | | float32 | float32 | number | unnecessary | +-----------------+-------------------+----------------------------+ Figure 9: CDDL Prelude mapping in JSON Appendix B. The IODEF Data Model (JSON Schema) This section provides a JSON schema [jsonschema] that defines the IODEF Data Model defined in this draft. Note that this section is Informative. { "$schema": "http://json-schema.org/draft-04/schema#", "definitions": { Takahashi, et al. Expires June 26, 2020 [Page 42] Internet-Draft JSON-IODEF December 2019 "action": {"enum": ["nothing","contact-source-site", "contact-target-site","contact-sender","investigate", "block-host","block-network","block-port","rate-limit-host", "rate-limit-network","rate-limit-port","redirect-traffic", "honeypot","upgrade-software","rebuild-asset","harden-asset", "remediate-other","status-triage","status-new-info", "watch-and-report","training","defined-coa","other", "ext-value"]}, "duration":{"enum":["second","minute","hour","day","month", "quarter","year","ext-value"]}, "SpecID":{ "enum":["urn:ietf:params:xml:ns:mile:mmdef:1.2","private"]}, "lang": { "type":"string","pattern":"^$|[a-zA-Z]{1,8}(-[a-zA-Z0-9]{1,8})*"}, "purpose": {"enum": ["traceback","mitigation","reporting","watch", "other","ext-value"]}, "restriction":{"enum":["public","partner","need-to-know","private", "default","white","green","amber","red","ext-value"]}, "status": {"enum": ["new","in-progress","forwarded","resolved", "future","ext-value"]}, "DATETIME": {"type": "string","format": "date-time"}, "BYTE": {"type": "string"}, "PortlistType": { "type": "string","pattern": "[0-9]+(\\-[0-9]+)?(,[0-9]+(\\-[0-9]+)?)*"}, "TimeZonetype": { "type":"string","pattern":"Z|[\\+\\-](0[0-9]|1[0-4]):[0-5][0-9]"}, "URLtype": { "type": "string", "pattern": "^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\\?([^#]*))?(#(.*))?"}, "IDtype": {"type": "string","pattern": "[a-zA-Z_][a-zA-Z0-9_.-]*"}, "IDREFType": {"$ref": "#/definitions/IDtype"}, "MLStringType": { "oneOf": [{"type": "string"}, {"type": "object", "properties": { "value": {"type": "string"}, "lang": {"$ref": "#/definitions/lang"}, "translation-id": {"type": "string"}}, "required": ["value"], "additionalProperties":false}]}, "PositiveFloatType": {"type": "number","minimum": 0}, "PAddressType": {"$ref": "#/definitions/MLStringType"}, "ExtensionType": { "type": "object", "properties": { "value": {"type": "string"}, "name": {"type": "string"}, Takahashi, et al. Expires June 26, 2020 [Page 43] Internet-Draft JSON-IODEF December 2019 "dtype":{"enum":["boolean","byte","bytes","character", "json", "date-time","ntpstamp","integer","portlist","real","string", "file","path","frame","packet","ipv4-packet","ipv6-packet", "url", "csv","winreg","xml","ext-value"],"default": "string"}, "ext-dtype": {"type": "string"}, "meaning": {"type": "string"}, "formatid": {"type": "string"}, "restriction": { "$ref": "#/definitions/restriction","default": "private"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}}, "required": ["value","dtype"], "additionalProperties":false}, "ExtensionTypeList": { "type": "array", "items": {"$ref": "#/definitions/ExtensionType"}, "minItems": 1}, "SoftwareType": { "type": "object", "properties": { "SoftwareReference":{"$ref": "#/definitions/SoftwareReference"}, "URL": { "type": "array", "items": {"$ref": "#/definitions/URLtype", "minItems": 1}}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1 }}, "required": [], "additionalProperties": false}, "SoftwareReference": { "type": "object", "properties": { "value": {"type": "string"}, "spec-name": {"enum": ["custom","cpe","swid","ext-value"]}, "ext-spec-name": {"type": "string"}, "dtype": {"enum": ["bytes","integer","real","string","xml", "ext-value"] , "default": "string"}, "ext-dtype": {"type": "string"}}, "required": ["spec-name"], "additionalProperties": false}, "StructuredInfo": { "type": "object", "properties": { "SpecID": {"$ref":"#/definitions/SpecID"}, "ext-SpecID": {"type": "string"}, "ContentID": {"type": "string"}, Takahashi, et al. Expires June 26, 2020 [Page 44] Internet-Draft JSON-IODEF December 2019 "RawData": { "type": "array", "items": {"$ref":"#/definitions/BYTE"}, "minItems": 1 }, "Reference": { "type": "array", "items": {"$ref": "#/definitions/Reference"}, "minItems": 1 }, "Platform": { "type": "array", "items": {"$ref": "#/definitions/Platform"}, "minItems": 1 }, "Scoring": { "type": "array", "items": {"$ref": "#/definitions/Scoring"}, "minItems": 1}}, "allOf": [ {"required": ["SpecID"]}, {"anyOf": [ {"oneOf": [ {"required":["Reference"]}, {"required":["RawData"]}]}, { "not" : {"required":["Reference", "RawData"]}}]}], "additionalProperties": false}, "Platform": { "type": "object", "properties": { "SpecID": {"$ref":"#/definitions/SpecID"}, "ext-SpecID": {"type": "string"}, "ContentID": {"type": "string"}, "RawData": { "type": "array", "items": {"$ref":"#/definitions/BYTE"}, "minItems": 1 }, "Reference": { "type": "array", "items": {"$ref": "#/definitions/Reference"}, "minItems": 1}}, "required": ["SpecID"], "additionalProperties": false}, "Scoring": { "type": "object", "properties": { "SpecID": {"$ref":"#/definitions/SpecID"}, Takahashi, et al. Expires June 26, 2020 [Page 45] Internet-Draft JSON-IODEF December 2019 "ext-SpecID": {"type": "string"}, "ContentID": {"type": "string"}, "RawData": { "type": "array", "items": {"$ref":"#/definitions/BYTE"}, "minItems": 1 }, "Reference": { "type": "array", "items": {"$ref": "#/definitions/Reference"}, "minItems": 1}}, "required": ["SpecID"], "additionalProperties": false}, "Incident": { "title": "Incident", "description": "JSON schema for Incident class", "type": "object", "properties": { "purpose": {"$ref": "#/definitions/purpose"}, "ext-purpose": {"type": "string"}, "status": {"$ref": "#/definitions/status"}, "ext-status": {"type": "string"}, "lang": {"$ref": "#/definitions/lang"}, "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "IncidentID": {"$ref": "#/definitions/IncidentID"}, "AlternativeID": {"$ref": "#/definitions/AlternativeID"}, "RelatedActivity": { "type": "array", "items": {"$ref": "#/definitions/RelatedActivity"}, "minItems": 1}, "DetectTime": {"$ref": "#/definitions/DATETIME"}, "StartTime": {"$ref": "#/definitions/DATETIME"}, "EndTime": {"$ref": "#/definitions/DATETIME"}, "RecoveryTime": {"$ref": "#/definitions/DATETIME"}, "ReportTime": {"$ref": "#/definitions/DATETIME"}, "GenerationTime": {"$ref": "#/definitions/DATETIME"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "Discovery": { "type": "array", "items": {"$ref": "#/definitions/Discovery"}, "minItems": 1}, "Assessment": { Takahashi, et al. Expires June 26, 2020 [Page 46] Internet-Draft JSON-IODEF December 2019 "type": "array", "items": {"$ref": "#/definitions/Assessment"}, "minItems": 1}, "Method": { "type": "array", "items": {"$ref": "#/definitions/Method"}, "minItems": 1}, "Contact": { "type": "array", "items": {"$ref": "#/definitions/Contact"}, "minItems": 1}, "EventData": { "type": "array", "items": {"$ref": "#/definitions/EventData"}, "minItems": 1}, "Indicator": { "type": "array", "items": {"$ref": "#/definitions/Indicator"}, "minItems": 1}, "History": {"$ref": "#/definitions/History"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["IncidentID","GenerationTime","Contact","purpose"], "additionalProperties": false}, "IncidentID": { "title": "IncidentID", "description": "JSON schema for IncidentID class", "type": "object", "properties": { "id": {"type": "string"}, "name": {"type": "string"}, "instance": {"type": "string"}, "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}}, "required": ["id","name"], "additionalProperties": false}, "AlternativeID": { "title": "AlternativeID", "description": "JSON schema for AlternativeID class", "type": "object", "properties": { "IncidentID": { "type": "array", "items":{"$ref": "#/definitions/IncidentID"}, "minItems": 1}, "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}}, Takahashi, et al. Expires June 26, 2020 [Page 47] Internet-Draft JSON-IODEF December 2019 "required": ["IncidentID"], "additionalProperties": false}, "RelatedActivity": { "properties": { "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "IncidentID": { "type": "array", "items": {"$ref": "#/definitions/IncidentID"}, "minItems": 1}, "URL": { "type": "array", "items": {"$ref": "#/definitions/URLtype"}, "minItems": 1}, "ThreatActor": { "type": "array", "items": {"$ref": "#/definitions/ThreatActor"}, "minItems": 1}, "Campaign": { "type": "array", "items": {"$ref": "#/definitions/Campaign"}, "minItems": 1}, "IndicatorID": { "type": "array", "items": {"$ref": "#/definitions/IndicatorID"}, "minItems": 1}, "Confidence": {"$ref": "#/definitions/Confidence"}, "Description": { "type": "array", "items": {"type": "string"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "additionalProperties": false}, "ThreatActor": { "properties": { "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "ThreatActorID": { "type": "array", "items": {"type": "string"}, "minItems": 1}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "URL": { Takahashi, et al. Expires June 26, 2020 [Page 48] Internet-Draft JSON-IODEF December 2019 "type":"array", "items":{"$ref":"#/definitions/URLtype"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "additionalProperties": false}, "Campaign": { "properties": { "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "CampaignID": { "type": "array", "items": {"type": "string"}, "minItems": 1}, "URL": { "type":"array", "items":{"$ref":"#/definitions/URLtype"}, "minItems": 1}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}}, "Contact": { "type": "object", "properties": { "role": { "enum":["creator","reporter","admin","tech","provider","user", "billing","legal","irt","abuse","cc","cc-irt","leo", "vendor","vendor-support","victim","victim-notified", "ext-value"]}, "ext-role": {"type": "string"}, "type": {"enum": ["person","organization","ext-value"]}, "ext-type": {"type": "string"}, "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "ContactName": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "ContactTitle": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, Takahashi, et al. Expires June 26, 2020 [Page 49] Internet-Draft JSON-IODEF December 2019 "minItems": 1}, "RegistryHandle": { "type":"array", "items":{"$ref":"#/definitions/RegistryHandle"}, "minItems": 1}, "PostalAddress": { "type":"array", "items":{"$ref":"#/definitions/PostalAddress"}, "minItems": 1}, "Email": { "type": "array", "items": {"$ref": "#/definitions/Email"}, "minItems": 1}, "Telephone": { "type": "array", "items": {"$ref": "#/definitions/Telephone"}, "minItems": 1}, "Timezone": {"$ref": "#/definitions/TimeZonetype"}, "Contact": { "type": "array", "items": {"$ref": "#/definitions/Contact"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["role","type"], "additionalProperties": false}, "RegistryHandle": { "type": "object", "properties": { "handle": {"type": "string"}, "registry": { "enum": ["internic","apnic","arin","lacnic","ripe","afrinic", "local","ext-value"]}, "ext-registry": {"type": "string"}}, "required": ["handle","registry"], "additionalProperties": false}, "PostalAddress": { "type": "object", "properties": { "type": { "enum": ["street","mailing","ext-value"]}, "ext-type": {"type": "string"}, "PAddress": {"$ref": "#/definitions/PAddressType"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}}, "required": ["PAddress"], "additionalProperties": false}, Takahashi, et al. Expires June 26, 2020 [Page 50] Internet-Draft JSON-IODEF December 2019 "Email": { "type": "object", "properties": { "type": { "enum":["direct","hotline","ext-value"]}, "ext-type": {"type": "string"}, "EmailTo": {"type": "string"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}}, "required": ["EmailTo"], "additionalProperties": false}, "Telephone": { "type": "object", "properties": { "type": { "enum":["wired","mobile","fax","hotline","ext-value"]}, "ext-type": {"type": "string"}, "TelephoneNumber": {"type": "string"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}}, "required": ["TelephoneNumber"], "additionalProperties": false}, "Discovery": { "type": "object", "properties": { "source": { "enum":["nidps","hips","siem","av","third-party-monitoring", "incident","os-log","application-log","device-log", "network-flow","passive-dns","investigation","audit", "internal-notification","external-notification","leo", "partner","actor","unknown","ext-value"]}, "ext-source": {"type": "string"}, "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "Contact": { "type": "array", "items": {"$ref": "#/definitions/Contact"}, "minItems": 1}, "DetectionPattern": { Takahashi, et al. Expires June 26, 2020 [Page 51] Internet-Draft JSON-IODEF December 2019 "type":"array", "items":{"$ref":"#/definitions/DetectionPattern"}, "minItems": 1}}, "required": [], "additionalProperties": false}, "DetectionPattern": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "Application": {"$ref": "#/definitions/SoftwareType"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "DetectionConfiguration": { "type": "array", "items": {"type": "string"}, "minItems": 1}}, "allOf": [ {"required": ["Application"]}, {"oneOf": [ {"required":["Description"]}, {"required":["DetectionConfiguration"]}]}], "additionalProperties": false}, "Method": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "Reference": { "type": "array", "items": {"$ref": "#/definitions/Reference"}, "minItems": 1}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "AttackPattern": { "type":"array", "items":{"$ref":"#/definitions/StructuredInfo"}, "minItems": 1}, "Vulnerability": { "type":"array", "items":{"$ref":"#/definitions/StructuredInfo"}, Takahashi, et al. Expires June 26, 2020 [Page 52] Internet-Draft JSON-IODEF December 2019 "minItems": 1}, "Weakness": { "type":"array", "items":{"$ref":"#/definitions/StructuredInfo"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": [], "additionalProperties": false}, "Reference": { "type": "object", "properties": { "observable-id": {"$ref": "#/definitions/IDtype"}, "ReferenceName": {"$ref":"#/definitions/ReferenceName"}, "URL":{ "type":"array", "items":{"$ref":"#/definitions/URLtype"}, "minItems": 1}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}}, "required": [], "additionalProperties": false}, "ReferenceName" : { "type": "object", "properties": { "specIndex": {"type": "number"}, "ID": {"$ref":"#/definitions/IDtype"}}, "required": ["specIndex","ID"], "additionalProperties": false}, "Assessment": { "type": "object", "properties": { "occurrence": {"enum":["actual","potential"]}, "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "IncidentCategory": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "Impact": { "type": "array", "items": { "properties": { "SystemImpact":{"$ref":"#/definitions/SystemImpact"}, "BusinessImpact":{"$ref":"#/definitions/BusinessImpact"}, Takahashi, et al. Expires June 26, 2020 [Page 53] Internet-Draft JSON-IODEF December 2019 "TimeImpact":{"$ref":"#/definitions/TimeImpact"}, "MonetaryImpact":{"$ref":"#/definitions/MonetaryImpact"}, "IntendedImpact":{"$ref":"#/definitions/BusinessImpact"}}, "additionalProperties":false}, "minItems" : 1 }, "Counter": { "type": "array", "items": {"$ref": "#/definitions/Counter"}, "minItems": 1}, "MitigatingFactor": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "Cause": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "Confidence": {"$ref": "#/definitions/Confidence"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["Impact"], "additionalProperties": false}, "SystemImpact": { "type": "object", "properties": { "severity": {"enum":["low","medium","high"]}, "completion": {"enum":["failed","succeeded"]}, "type": { "enum":["takeover-account","takeover-service", "takeover-system","cps-manipulation","cps-damage", "availability-data","availability-account", "availability-service","availability-system", "damaged-system","damaged-data","breach-proprietary", "breach-privacy","breach-credential", "breach-configuration","integrity-data", "integrity-configuration","integrity-hardware", "traffic-redirection","monitoring-traffic", "monitoring-host","policy","unknown","ext-value"]}, "ext-type": {"type": "string"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}}, "required": ["type"], "additionalProperties": false}, "BusinessImpact": { "type": "object", "properties": { Takahashi, et al. Expires June 26, 2020 [Page 54] Internet-Draft JSON-IODEF December 2019 "severity": {"enum":["none","low","medium","high","unknown", "ext-value"],"default": "unknown"}, "ext-severity": {"type":"string"}, "type": {"enum":["breach-proprietary","breach-privacy", "breach-credential","loss-of-integrity","loss-of-service", "theft-financial","theft-service","degraded-reputation", "asset-damage","asset-manipulation","legal","extortion", "unknown","ext-value"]}, "ext-type": {"type": "string"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}}, "required": ["type"], "additionalProperties": false}, "TimeImpact": { "type": "object", "properties": { "value": {"$ref": "#/definitions/PositiveFloatType"}, "severity": {"enum": ["low","medium","high"]}, "metric": {"enum": ["labor","elapsed","downtime","ext-value"]}, "ext-metric": {"type": "string"}, "duration": {"$ref":"#/definitions/duration","default": "hour"}, "ext-duration": {"type": "string"}}, "required": ["value","metric"], "additionalProperties": false}, "MonetaryImpact": { "type": "object", "properties": { "value": {"$ref": "#/definitions/PositiveFloatType"}, "severity": {"enum":["low","medium","high"]}, "currency": {"type": "string"}}, "required": ["value"], "additionalProperties": false}, "Confidence": { "type": "object", "properties": { "value": {"type": "number"}, "rating": {"enum": ["low","medium","high","numeric","unknown", "ext-value"]}, "ext-rating": {"type":"string"}}, "required": ["value","rating"], "additionalProperties": false}, "History": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, Takahashi, et al. Expires June 26, 2020 [Page 55] Internet-Draft JSON-IODEF December 2019 "ext-restriction": {"type": "string"}, "HistoryItem": { "type": "array", "items": {"$ref": "#/definitions/HistoryItem"}, "minItems": 1}}, "required": ["HistoryItem"], "additionalProperties": false}, "HistoryItem": { "type": "object", "properties": { "action": {"$ref": "#/definitions/action","default": "other"}, "ext-action": {"type": "string"}, "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "DateTime": {"$ref": "#/definitions/DATETIME"}, "IncidentID": {"$ref": "#/definitions/IncidentID"}, "Contact": {"$ref": "#/definitions/Contact"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "DefinedCOA": { "type": "array", "items": {"type": "string"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["DateTime","action"], "additionalProperties": false}, "EventData": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "Description": {"type": "array", "items": { "$ref":"#/definitions/MLStringType"}}, "DetectTime": {"$ref": "#/definitions/DATETIME"}, "StartTime": {"$ref": "#/definitions/DATETIME"}, "EndTime": {"$ref": "#/definitions/DATETIME"}, "RecoveryTime": {"$ref": "#/definitions/DATETIME"}, "ReportTime": {"$ref": "#/definitions/DATETIME"}, "Contact": { "type": "array", "items": {"$ref": "#/definitions/Contact"}, "minItems": 1}, Takahashi, et al. Expires June 26, 2020 [Page 56] Internet-Draft JSON-IODEF December 2019 "Discovery": { "type": "array", "items": {"$ref": "#/definitions/Discovery"}, "minItems": 1}, "Assessment": {"$ref": "#/definitions/Assessment"}, "Method": { "type": "array", "items": {"$ref": "#/definitions/Method"}, "minItems": 1}, "System": { "type": "array", "items": {"$ref": "#/definitions/System"}, "minItems": 1}, "Expectation": { "type": "array", "items": {"$ref": "#/definitions/Expectation"}, "minItems": 1}, "RecordData": { "type": "array", "items": {"$ref": "#/definitions/RecordData"}, "minItems": 1}, "EventData": { "type": "array", "items": {"$ref": "#/definitions/EventData"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": [], "additionalProperties": false}, "Expectation": { "type": "object", "properties": { "action": {"$ref":"#/definitions/action","default": "other"}, "ext-action": {"type": "string"}, "severity": {"enum": ["low","medium","high"]}, "restriction": {"$ref": "#/definitions/restriction", "default": "default"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "DefinedCOA": { "type": "array", "items": {"type": "string"}, "minItems": 1}, "StartTime": {"$ref": "#/definitions/DATETIME"}, "EndTime": {"$ref": "#/definitions/DATETIME"}, Takahashi, et al. Expires June 26, 2020 [Page 57] Internet-Draft JSON-IODEF December 2019 "Contact": {"$ref": "#/definitions/Contact"}}, "required": [], "additionalProperties": false}, "System": { "type": "object", "properties": { "category": { "enum": ["source","target","intermediate","sensor", "infrastructure","ext-value"]}, "ext-category": {"type": "string"}, "interface": {"type": "string"}, "spoofed": {"enum": ["unknown","yes","no"],"default":"unknown"}, "virtual": {"enum": ["yes","no","unknown"],"default":"unknown"}, "ownership": { "enum":["organization","personal","partner","customer", "no-relationship","unknown","ext-value"]}, "ext-ownership": {"type": "string"}, "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "Node": {"$ref": "#/definitions/Node"}, "NodeRole": { "type": "array", "items": {"$ref": "#/definitions/NodeRole"}, "minItems": 1}, "Service": { "type": "array", "items": {"$ref": "#/definitions/Service"}, "minItems": 1}, "OperatingSystem": { "type": "array", "items": {"$ref": "#/definitions/SoftwareType"}, "minItems": 1}, "Counter": { "type": "array", "items": {"$ref": "#/definitions/Counter"}, "minItems": 1}, "AssetID": { "type": "array", "items": {"type": "string"}, "minItems": 1}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["Node"], Takahashi, et al. Expires June 26, 2020 [Page 58] Internet-Draft JSON-IODEF December 2019 "additionalProperties": false}, "Node": { "type": "object", "properties": { "DomainData": { "type": "array", "items": {"$ref": "#/definitions/DomainData"}, "minItems": 1}, "Address": { "type": "array", "items": {"$ref": "#/definitions/Address"}, "minItems": 1}, "PostalAddress": {"$ref": "#/definitions/PostalAddress"}, "Location": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "Counter": { "type":"array", "items":{"$ref":"#/definitions/Counter"}, "minItems": 1}}, "anyOf": [ {"required": ["DomainData"]}, {"required": ["Address"]} ], "additionalProperties": false}, "Address": { "type": "object", "properties": { "value": {"type": "string"}, "category": { "enum":["asn","atm","e-mail","ipv4-addr","ipv4-net", "ipv4-net-masked","ipv4-net-mask","ipv6-addr","ipv6-net", "ipv6-net-masked","mac","site-uri","ext-value"], "default": "ipv6-addr"}, "ext-category": {"type": "string"}, "vlan-name": {"type": "string"}, "vlan-num": {"type": "number"}, "observable-id": {"$ref": "#/definitions/IDtype"}}, "required": ["value","category"], "additionalProperties": false}, "NodeRole": { "type": "object", "properties": { "category": { "enum":["client","client-enterprise","client-partner", "client-remote","client-kiosk","client-mobile", "server-internal","server-public","www","mail","webmail", Takahashi, et al. Expires June 26, 2020 [Page 59] Internet-Draft JSON-IODEF December 2019 "messaging","streaming","voice","file","ftp","p2p","name", "directory","credential","print","application","database", "backup","dhcp","assessment","source-control", "config-management","monitoring","infra","infra-firewall", "infra-router","infra-switch","camera","proxy", "remote-access","log","virtualization","pos", "scada", "scada-supervisory","sinkhole","honeypot","anomyzation", "c2-server","malware-distribution","drop-server", "hop-point","reflector","phishing-site", "spear-phishing-site","recruiting-site","fraudulent-site", "ext-value"]}, "ext-category": {"type": "string"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}}, "required": ["category"], "additionalProperties": false}, "Counter": { "type": "object", "properties": { "value": {"type": "number"}, "type": {"enum": ["count","peak","average","ext-value"]}, "ext-type": {"type": "string"}, "unit":{"enum":["byte","mbit","packet","flow","session","alert", "message","event","host","site","organization","ext-value"]}, "ext-unit": {"type": "string"}, "meaning": {"type": "string"}, "duration": {"$ref":"#/definitions/duration","default": "hour"}, "ext-duration": {"type": "string"}}, "required": ["value","type","unit"], "additionalProperties": false}, "DomainData": { "type": "object", "properties": { "system-status": { "enum": ["spoofed","fraudulent","innocent-hacked", "innocent-hijacked","unknown","ext-value"]}, "ext-system-status": {"type": "string"}, "domain-status": { "enum": [ "reservedDelegation","assignedAndActive", "assignedAndInactive","assignedAndOnHold","revoked", "transferPending","registryLock","registrarLock", "other","unknown","ext-value"]}, "ext-domain-status": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "Name": {"type": "string"}, "DateDomainWasChecked": {"$ref": "#/definitions/DATETIME"}, Takahashi, et al. Expires June 26, 2020 [Page 60] Internet-Draft JSON-IODEF December 2019 "RegistrationDate": {"$ref": "#/definitions/DATETIME"}, "ExpirationDate": {"$ref": "#/definitions/DATETIME"}, "RelatedDNS": { "type": "array", "items": {"$ref": "#/definitions/ExtensionType"}, "minItems": 1}, "NameServers": { "type": "array", "items": {"$ref": "#/definitions/NameServers"}, "minItems": 1}, "DomainContacts": {"$ref": "#/definitions/DomainContacts"}}, "required": ["Name","system-status","domain-status"], "additionalProperties": false}, "NameServers": { "type": "object", "properties": { "Server": {"type": "string"}, "Address": { "type":"array", "items":{"$ref":"#/definitions/Address"}, "minItems": 1}}, "required": ["Server","Address"], "additionalProperties": false}, "DomainContacts": { "type": "object", "properties": { "SameDomainContact": {"type": "string"}, "Contact": { "type":"array", "items":{"$ref":"#/definitions/Contact"}, "minItems": 1}}, "oneOf": [ {"required": ["SameDomainContact"]}, {"required": ["Contact"]}], "additionalProperties": false}, "Service": { "type": "object", "properties": { "ip-protocol": {"type": "number"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "ServiceName": {"$ref": "#/definitions/ServiceName"}, "Port": {"type": "number"}, "Portlist": {"$ref": "#/definitions/PortlistType"}, "ProtoCode": {"type": "number"}, "ProtoType": {"type": "number"}, "ProtoField": {"type": "number"}, "ApplicationHeaderField":{ "$ref":"#/definitions/ExtensionTypeList"}, Takahashi, et al. Expires June 26, 2020 [Page 61] Internet-Draft JSON-IODEF December 2019 "EmailData": {"$ref": "#/definitions/EmailData"}, "Application": {"$ref": "#/definitions/SoftwareType"}}, "required": [], "additionalProperties": false}, "ServiceName": { "type": "object", "properties": { "IANAService": {"type": "string"}, "URL": { "type": "array","items": {"$ref": "#/definitions/URLtype"}}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}}, "required": [], "additionalProperties": false}, "EmailData": { "type": "object", "properties": { "observable-id": {"$ref": "#/definitions/IDtype"}, "EmailTo": { "type": "array", "items": {"type": "string"}, "minItems": 1}, "EmailFrom": {"type": "string"}, "EmailSubject": {"type": "string"}, "EmailX-Mailer": {"type": "string"}, "EmailHeaderField": { "type": "array", "items": {"$ref": "#/definitions/ExtensionType"}, "minItems": 1}, "EmailHeaders": {"type": "string"}, "EmailBody": {"type": "string"}, "EmailMessage": {"type": "string"}, "HashData": { "type": "array", "items": {"$ref": "#/definitions/HashData"}, "minItems": 1}, "Signature": { "type": "array", "items": {"$ref": "#/definitions/BYTE"}, "minItems": 1}}, "required": [], "additionalProperties": false}, "RecordData": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction", Takahashi, et al. Expires June 26, 2020 [Page 62] Internet-Draft JSON-IODEF December 2019 "default": "private"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "DateTime": {"$ref": "#/definitions/DATETIME"}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "Application": {"$ref": "#/definitions/SoftwareType"}, "RecordPattern": { "type": "array", "items": {"$ref": "#/definitions/RecordPattern"}, "minItems": 1}, "RecordItem": { "type": "array", "items": {"$ref": "#/definitions/ExtensionType"}, "minItems": 1}, "URL": { "type": "array", "items": {"$ref": "#/definitions/URLtype"}, "minItems": 1}, "FileData": { "type": "array", "items": {"$ref": "#/definitions/FileData"}, "minItems": 1}, "WindowsRegistryKeysModified": { "type": "array", "items": {"$ref":"#/definitions/WindowsRegistryKeysModified"}, "minItems": 1}, "CertificateData": { "type":"array", "items":{"$ref":"#/definitions/CertificateData"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": [], "additionalProperties": false}, "RecordPattern": { "type": "object", "properties": { "value": {"type": "string"}, "type": {"enum": ["regex","binary","xpath","ext-value"], "default": "regex"}, "ext-type": {"type": "string"}, "offset": {"type": "number"}, "offsetunit": {"enum":["line","byte","ext-value"] , "default": "line"}, "ext-offsetunit": {"type": "string"}, "instance": {"type": "number"}}, Takahashi, et al. 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Expires June 26, 2020 [Page 64] Internet-Draft JSON-IODEF December 2019 "FileData": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "File": { "type": "array", "items": {"$ref": "#/definitions/File"}, "minItems": 1}}, "required": ["File"], "additionalProperties": false}, "File": { "type": "object", "properties": { "observable-id": {"$ref": "#/definitions/IDtype"}, "FileName": {"type": "string"}, "FileSize": {"type": "number"}, "FileType": {"type": "string"}, "URL": { "type": "array", "items": {"$ref": "#/definitions/URLtype"}, "minItems": 1}, "HashData": {"$ref": "#/definitions/HashData"}, "Signature": { "type": "array", "items": {"$ref": "#/definitions/BYTE"}, "minItems": 1}, "AssociatedSoftware": {"$ref": "#/definitions/SoftwareType"}, "FileProperties": { "type":"array", "items":{"$ref":"#/definitions/ExtensionType"}, "minItems": 1}}, "required": [], "additionalProperties": false}, "HashData": { "type": "object", "properties": { "scope": {"enum": ["file-contents","file-pe-section", "file-pe-iat","file-pe-resource","file-pdf-object", "email-hash","email-headers-hash","email-body-hash", "ext-value"]}, "HashTargetID": {"type": "string"}, "Hash": { "type": "array", "items": {"$ref": "#/definitions/Hash"}, "minItems": 1}, "FuzzyHash": { Takahashi, et al. Expires June 26, 2020 [Page 65] Internet-Draft JSON-IODEF December 2019 "type": "array", "items": {"$ref": "#/definitions/FuzzyHash"}, "minItems": 1}}, "required": ["scope"], "additionalProperties": false}, "Hash": { "type": "object", "properties": { "DigestMethod": {"$ref": "#/definitions/BYTE"}, "DigestValue": {"$ref": "#/definitions/BYTE"}, "CanonicalizationMethod": {"$ref": "#/definitions/BYTE"}, "Application": {"$ref": "#/definitions/SoftwareType"}}, "required": ["DigestMethod","DigestValue"], "additionalProperties": false}, "FuzzyHash": { "type": "object", "properties": { "FuzzyHashValue": { "type": "array", "items": {"$ref": "#/definitions/ExtensionType"}, "minItems": 1}, "Application": {"$ref": "#/definitions/SoftwareType"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["FuzzyHashValue"], "additionalProperties": false}, "Indicator": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "IndicatorID": {"$ref": "#/definitions/IndicatorID"}, "AlternativeIndicatorID": { "type": "array", "items": {"$ref": "#/definitions/AlternativeIndicatorID"}, "minItems": 1}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "StartTime": {"$ref": "#/definitions/DATETIME"}, "EndTime": {"$ref": "#/definitions/DATETIME"}, "Confidence": {"$ref": "#/definitions/Confidence"}, "Contact": { "type": "array", "items": {"$ref": "#/definitions/Contact"}, "minItems": 1}, "Observable": {"$ref": "#/definitions/Observable"}, Takahashi, et al. Expires June 26, 2020 [Page 66] Internet-Draft JSON-IODEF December 2019 "uid-ref": {"$ref": "#/definitions/IDREFType"}, "IndicatorExpression":{ "$ref":"#/definitions/IndicatorExpression"}, "IndicatorReference":{ "$ref": "#/definitions/IndicatorReference"}, "NodeRole": { "type": "array", "items": {"$ref": "#/definitions/NodeRole"}, "minItems": 1}, "AttackPhase": { "type": "array", "items": {"$ref": "#/definitions/AttackPhase"}, "minItems": 1}, "Reference": { "type": "array", "items": {"$ref": "#/definitions/Reference"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "allOf": [ {"required": ["IndicatorID"]}, {"oneOf": [ {"required":["Observable"]}, {"required":["uid-ref"]}, {"required":["IndicatorExpression"]}, {"required":["IndicatorReference"]}]}], "additionalProperties": false}, "IndicatorID": { "type": "object", "properties": { "id": {"type": "string"}, "name": {"type": "string"}, "version": {"type": "string"}}, "required": ["id","name","version"], "additionalProperties": false}, "AlternativeIndicatorID": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "IndicatorID": { "type": "array", "items": {"$ref": "#/definitions/IndicatorID"}, "minItems": 1}}, "required": ["IndicatorID"], "additionalProperties": false}, "Observable": { "type": "object", Takahashi, et al. Expires June 26, 2020 [Page 67] Internet-Draft JSON-IODEF December 2019 "properties": { "restriction": {"$ref": "#/definitions/restriction", "default": "private"}, "ext-restriction": {"type": "string"}, "System": {"$ref": "#/definitions/System"}, "Address": {"$ref": "#/definitions/Address"}, "DomainData": {"$ref": "#/definitions/DomainData"}, "EmailData": {"$ref": "#/definitions/EmailData"}, "Service": {"$ref": "#/definitions/Service"}, "WindowsRegistryKeysModified": { "$ref": "#/definitions/WindowsRegistryKeysModified"}, "FileData": {"$ref": "#/definitions/FileData"}, "CertificateData": {"$ref": "#/definitions/CertificateData"}, "RegistryHandle": {"$ref": "#/definitions/RegistryHandle"}, "RecordData": {"$ref": "#/definitions/RecordData"}, "EventData": {"$ref": "#/definitions/EventData"}, "Incident": {"$ref": "#/definitions/Incident"}, "Expectation": {"$ref": "#/definitions/Expectation"}, "Reference": {"$ref": "#/definitions/Reference"}, "Assessment": {"$ref": "#/definitions/Assessment"}, "DetectionPattern": {"$ref": "#/definitions/DetectionPattern"}, "HistoryItem": {"$ref": "#/definitions/HistoryItem"}, "BulkObservable": {"$ref": "#/definitions/BulkObservable"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "oneOf": [ {"required":["System"]}, {"required":["Address"]}, {"required":["DomainData"]}, {"required":["EmailData"]}, {"required":["Service"]}, {"required":["WindowsRegistryKeysModified"]}, {"required":["FileData"]}, {"required":["CertificateData"]}, {"required":["RegistryHandle"]}, {"required":["RecordData"]}, {"required":["EventData"]}, {"required":["Incident"]}, {"required":["Expectation"]}, {"required":["Reference"]}, {"required":["Assessment"]}, {"required":["DetectionPattern"]}, {"required":["HistoryItem"]}, {"required":["BulkObservable"]}, {"required":["AdditionalData"]}], "additionalProperties": false}, "BulkObservable": { "type": "object", "properties": { Takahashi, et al. Expires June 26, 2020 [Page 68] Internet-Draft JSON-IODEF December 2019 "type": {"enum": ["asn","atm","e-mail","ipv4-addr","ipv4-net", "ipv4-net-mask","ipv6-addr","ipv6-net","ipv6-net-mask", "mac","site-uri","domain-name","domain-to-ipv4", "domain-to-ipv6","domain-to-ipv4-timestamp", "domain-to-ipv6-timestamp","ipv4-port","ipv6-port", "windows-reg-key","file-hash","email-x-mailer", "email-subject","http-user-agent","http-request-url", "mutex","file-path","user-name","ext-value"]}, "ext-type": {"type": "string"}, "BulkObservableFormat":{ "$ref": "#/definitions/BulkObservableFormat"}, "BulkObservableList": {"type": "string"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["BulkObservableList"], "additionalProperties": false}, "BulkObservableFormat": { "type": "object", "properties": { "Hash": {"$ref": "#/definitions/Hash"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "oneOf": [ {"required": ["Hash"]}, {"required": ["AdditionalData"]} ], "additionalProperties": false}, "IndicatorExpression": { "type": "object", "properties": { "operator": {"enum": ["not","and","or","xor"],"default": "and"}, "ext-operator": {"type": "string"}, "IndicatorExpression": { "type": "array", "items": {"$ref": "#/definitions/IndicatorExpression"}, "minItems": 1}, "Observable": { "type": "array", "items": {"$ref": "#/definitions/Observable"}, "minItems": 1}, "uid-ref": { "type": "array", "items": {"$ref": "#/definitions/IDREFType"}, "minItems": 1}, "IndicatorReference": { "type": "array", "items": {"$ref": "#/definitions/IndicatorReference"}, "minItems": 1}, "Confidence": {"$ref":"#/definitions/Confidence"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, Takahashi, et al. Expires June 26, 2020 [Page 69] Internet-Draft JSON-IODEF December 2019 "required": [], "additionalProperties": false}, "IndicatorReference": { "type": "object", "properties": { "uid-ref": {"$ref":"#/definitions/IDREFType"}, "euid-ref": {"type": "string"}, "version": {"type": "string"}}, "oneOf": [ {"required": ["uid-ref"]}, {"required": ["euid-ref"]} ], "additionalProperties": false}, "AttackPhase": { "type": "object", "properties": { "AttackPhaseID": { "type": "array", "items": {"type": "string"}, "minItems": 1}, "URL": { "type": "array", "items": {"$ref": "#/definitions/URLtype"}, "minItems": 1}, "Description": { "type": "array", "items": {"$ref": "#/definitions/MLStringType"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": [], "additionalProperties": false}}, "title": "IODEF-Document", "description": "JSON schema for IODEF-Document class", "type": "object", "properties": { "version": {"type": "string"}, "lang": {"$ref": "#/definitions/lang"}, "format-id": {"type": "string"}, "private-enum-name": {"type": "string"}, "private-enum-id": {"type": "string"}, "Incident": { "type": "array", "items": {"$ref": "#/definitions/Incident"}, "minItems": 1}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["version","Incident"], "additionalProperties": false} Takahashi, et al. Expires June 26, 2020 [Page 70] Internet-Draft JSON-IODEF December 2019 Figure 10: JSON schema Authors' Addresses Takeshi Takahashi National Institute of Information and Communications Technology 4-2-1 Nukui-Kitamachi Koganei, Tokyo 184-8795 Japan Phone: +81 42 327 5862 Email: takeshi_takahashi@nict.go.jp Roman Danyliw CERT, Software Engineering Institute, Carnegie Mellon University 4500 Fifth Avenue Pittsburgh, PA USA Email: rdd@cert.org Mio Suzuki National Institute of Information and Communications Technology 4-2-1 Nukui-Kitamachi Koganei, Tokyo 184-8795 Japan Email: mio@nict.go.jp Takahashi, et al. Expires June 26, 2020 [Page 71]