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Indicator Object

Indicator An indicator is a test, or a collection of judgements that define criteria for identifying the activity, or presence of malware, or other unwanted software.

We follow the STiX IndicatorType closely, with the exception of not including observables within the indicator, and preferring a specification object encoded in JSON as opposed to an opaque implementation block.

Additional, you will want to either define judgements against Observables that are linked to this indicator, with the ID in the indicators field of those Judgements, or you can provide a specification value.

Property	Type	Description	Required?
id	String	Globally unique URI identifying this object.	✓
producer	ShortStringString		✓
schema_version	String	CTIM schema version for this entity	✓
type	IndicatorTypeIdentifierString	The fixed value indicator	✓
valid_time	ValidTime Object	The time range during which this Indicator is considered valid.	✓
composite_indicator_expression	CompositeIndicatorExpression Object
confidence	HighMedLowString	level of confidence held in the accuracy of this Indicator
description	MarkdownString	A description of object, which may be detailed.
external_ids	String List
external_references	ExternalReference Object List	Specifies a list of external references which refers to non-CTIM information. This property is used to provide one or more URLs, descriptions, or IDs to records in other systems.
indicator_type	IndicatorTypeString List	Specifies the type or types for this Indicator
kill_chain_phases	KillChainPhase Object List	relevant kill chain phases indicated by this Indicator
language	ShortStringString	The human language this object is specified in.
likely_impact	LongStringString	likely potential impact within the relevant context if this Indicator were to occur
negate	Boolean	specifies the absence of the pattern
revision	Integer	A monotonically increasing revision, incremented each time the object is changed.
severity	HighMedLowString
short_description	MedStringString	A single line, short summary of the object.
source	MedStringString
source_uri	String
specification	JudgementSpecification Object
tags	ShortStringString List	Descriptors for this indicator
test_mechanisms	MedStringString List	Test Mechanisms effective at identifying the cyber Observables specified in this cyber threat Indicator
timestamp	Inst (Date)	The time this object was created at, or last modified.
title	ShortStringString	A short title for this object, used as primary display and reference value
tlp	TLPString	Specification for how, and to whom, this object can be shared.

Reference: IndicatorType

Property composite_indicator_expression ∷ CompositeIndicatorExpression Object

This entry is optional

CompositeIndicatorExpression Object Value
- Details: CompositeIndicatorExpression Object

Property confidence ∷ HighMedLowString

level of confidence held in the accuracy of this Indicator

This entry is optional
- Allowed Values:
  - Critical
  - High
  - Info
  - Low
  - Medium
  - None
  - Unknown
- Reference: HighMedLowVocab

Property description ∷ MarkdownString

A description of object, which may be detailed.

This entry is optional
- Markdown Markdown string with at most 5000 characters

Property external_ids ∷ String List

This entry is optional
This entry's type is sequential (allows zero or more values)

Property external_references ∷ ExternalReference Object List

Specifies a list of external references which refers to non-CTIM information. This property is used to provide one or more URLs, descriptions, or IDs to records in other systems.

This entry is optional
This entry's type is sequential (allows zero or more values)

ExternalReference Object Value
- Details: ExternalReference Object

Property id ∷ String

Globally unique URI identifying this object.

This entry is required
- IDs are URIs, for example https://www.domain.com/ctia/judgement/judgement-de305d54-75b4-431b-adb2-eb6b9e546014 for a Judgement. This ID type compares to the STIX id field. The optional STIX idref field is not used.

Property indicator_type ∷ IndicatorTypeString List

Specifies the type or types for this Indicator

This entry is optional
This entry's type is sequential (allows zero or more values)
- Allowed Values:
  - Anonymization
  - C2
  - Compromised PKI Certificate
  - Domain Watchlist
  - Exfiltration
  - File Hash Watchlist
  - Host Characteristics
  - IMEI Watchlist
  - IMSI Watchlist
  - IP Watchlist
  - Login Name
  - Malicious E-mail
  - Malware Artifacts
  - Private Threat Feed
  - URL Watchlist
- Reference: IndicatorTypeVocab

Property kill_chain_phases ∷ KillChainPhase Object List

relevant kill chain phases indicated by this Indicator

This entry is optional
This entry's type is sequential (allows zero or more values)
Dev Notes: simplified

KillChainPhase Object Value
- Details: KillChainPhase Object

Property language ∷ ShortStringString

The human language this object is specified in.

This entry is optional
- ShortString String with at most 1024 characters

Property likely_impact ∷ LongStringString

likely potential impact within the relevant context if this Indicator were to occur

This entry is optional
- LongString String with at most 5000 characters

Property negate ∷ Boolean

specifies the absence of the pattern

This entry is optional

Property producer ∷ ShortStringString

This entry is required
Dev Notes: TODO - Document what is supposed to be in this field!
- ShortString String with at most 1024 characters

Property revision ∷ Integer

A monotonically increasing revision, incremented each time the object is changed.

This entry is optional
- Zero, or a positive integer

Property schema_version ∷ String

CTIM schema version for this entity

This entry is required
- A semantic version matching the CTIM version against which this object should be valid.

Property severity ∷ HighMedLowString

This entry is optional
- Allowed Values:
  - Critical
  - High
  - Info
  - Low
  - Medium
  - None
  - Unknown
- Reference: HighMedLowVocab

Property short_description ∷ MedStringString

A single line, short summary of the object.

This entry is optional
- MedString String with at most 2048 characters

Property source ∷ MedStringString

This entry is optional
- MedString String with at most 2048 characters

Property source_uri ∷ String

This entry is optional
- A URI

Property specification ∷ Either

This entry is optional
- Only one of the following schemas will match

JudgementSpecification Object Value
- Details: JudgementSpecification Object

ThreatBrainSpecification Object Value
- Details: ThreatBrainSpecification Object

SnortSpecification Object Value
- Details: SnortSpecification Object

SIOCSpecification Object Value
- Details: SIOCSpecification Object

OpenIOCSpecification Object Value
- Details: OpenIOCSpecification Object

Property tags ∷ ShortStringString List

Descriptors for this indicator

This entry is optional
This entry's type is sequential (allows zero or more values)
- ShortString String with at most 1024 characters

Property test_mechanisms ∷ MedStringString List

Test Mechanisms effective at identifying the cyber Observables specified in this cyber threat Indicator

This entry is optional
This entry's type is sequential (allows zero or more values)
Dev Notes: simplified
- MedString String with at most 2048 characters

Property timestamp ∷ Inst (Date)

The time this object was created at, or last modified.

This entry is optional
- ISO8601 Timestamp Schema definition for all date or timestamp values. Serialized as a string, the field should follow the rules of the ISO8601 standard.

Property title ∷ ShortStringString

A short title for this object, used as primary display and reference value

This entry is optional
- ShortString String with at most 1024 characters

Property tlp ∷ TLPString

Specification for how, and to whom, this object can be shared.

This entry is optional
- TLP TLP stands for Traffic Light Protocol, which indicates precisely how this resource is intended to be shared, replicated, copied, etc.
- Default: green
- Allowed Values:
  - amber
  - green
  - red
  - white

Property type ∷ IndicatorTypeIdentifierString

The fixed value indicator

This entry is required
- IndicatorTypeIdentifier The fixed value "indicator"
- Must equal: "indicator"

Property valid_time ∷ ValidTime Object

The time range during which this Indicator is considered valid.

This entry is required

ValidTime Object Value
- Details: ValidTime Object

ExternalReference Object

ExternalReference External references are used to describe pointers to information represented outside of CTIM. For example, a Malware object could use an external reference to indicate an ID for that malware in an external database or a report could use references to represent source material.

Property	Type	Description	Required?
source_name	MedStringString	The source within which the external-reference is defined (system, registry, organization, etc.)	✓
description	MarkdownString
external_id	String	An identifier for the external reference content.
hashes	String List	Specifies a dictionary of hashes for the contents of the url.
url	String	A URL reference to an external resource

Reference: External Reference

Property description ∷ MarkdownString

This entry is optional
- Markdown Markdown string with at most 5000 characters

Property external_id ∷ String

An identifier for the external reference content.

This entry is optional

Property hashes ∷ String List

Specifies a dictionary of hashes for the contents of the url.

This entry is optional
This entry's type is sequential (allows zero or more values)

Property source_name ∷ MedStringString

The source within which the external-reference is defined (system, registry, organization, etc.)

This entry is required
- MedString String with at most 2048 characters

Property url ∷ String

A URL reference to an external resource

This entry is optional
- A URI

ValidTime Object

ValidTime Period of time when a cyber observation is valid.

Property	Type	Description	Required?
end_time	Inst (Date)	If end_time is not present, then the valid time position of the object does not have an upper bound.
start_time	Inst (Date)	If not present, the valid time position of the indicator does not have an upper bound

Reference: ValidTimeType

Property end_time ∷ Inst (Date)

If end_time is not present, then the valid time position of the object does not have an upper bound.

This entry is optional
- ISO8601 Timestamp Schema definition for all date or timestamp values. Serialized as a string, the field should follow the rules of the ISO8601 standard.

Property start_time ∷ Inst (Date)

If not present, the valid time position of the indicator does not have an upper bound

This entry is optional
- ISO8601 Timestamp Schema definition for all date or timestamp values. Serialized as a string, the field should follow the rules of the ISO8601 standard.

CompositeIndicatorExpression Object

Property	Type	Description	Required?
indicator_ids	String List		✓
operator	BooleanOperatorString		✓

Reference: CompositeIndicatorExpressionType

Property indicator_ids ∷ String List

This entry is required
This entry's type is sequential (allows zero or more values)
- A URI leading to an indicator

Property operator ∷ BooleanOperatorString

This entry is required
- Allowed Values:
  - and
  - not
  - or

KillChainPhase Object

KillChainPhase The kill-chain-phase represents a phase in a kill chain, which describes the various phases an attacker may undertake in order to achieve their objectives.

Property	Type	Description	Required?
kill_chain_name	String	The name of the kill chain.	✓
phase_name	String	The name of the phase in the kill chain.	✓

Reference: Kill Chain Phase

Property kill_chain_name ∷ String

The name of the kill chain.

This entry is required
- SHOULD be all lowercase (where lowercase is defined by the locality conventions) and SHOULD use hyphens instead of spaces or underscores as word separators.
- Must equal: "lockheed-martin-cyber-kill-chain"
- Reference: Open Vocabulary

Property phase_name ∷ String

The name of the phase in the kill chain.

This entry is required
- SHOULD be all lowercase (where lowercase is defined by the locality conventions) and SHOULD use hyphens instead of spaces or underscores as word separators.
- Allowed Values:
  - actions-on-objective
  - command-and-control
  - delivery
  - exploitation
  - installation
  - reconnaissance
  - weaponization
- Reference: Open Vocabulary

JudgementSpecification Object

JudgementSpecification An indicator based on a list of judgements. If any of the Observables in it's judgements are encountered, than it may be matches against. If there are any required judgements, they all must be matched in order for the indicator to be considered a match.

Property	Type	Required?
judgements	String List	✓
required_judgements	RelatedJudgement Object List	✓
type	JudgementSpecificationTypeString	✓

Property judgements ∷ String List

This entry is required
This entry's type is sequential (allows zero or more values)
- A URI leading to a judgement

Property required_judgements ∷ RelatedJudgement Object List

This entry is required
This entry's type is sequential (allows zero or more values)

RelatedJudgement Object Value
- Details: RelatedJudgement Object

Property type ∷ JudgementSpecificationTypeString

This entry is required
- Must equal: "Judgement"

RelatedJudgement Object

Property	Type	Required?
judgement_id	String	✓
confidence	HighMedLowString
relationship	String
source	String

Property confidence ∷ HighMedLowString

This entry is optional
- Allowed Values:
  - Critical
  - High
  - Info
  - Low
  - Medium
  - None
  - Unknown
- Reference: HighMedLowVocab

Property judgement_id ∷ String

This entry is required
- A URI leading to a judgement

Property relationship ∷ String

This entry is optional

Property source ∷ String

This entry is optional

ThreatBrainSpecification Object

ThreatBrainSpecification An indicator which runs in threatbrain...

Property	Type	Required?
type	ThreatBrainSpecificationTypeString	✓
variables	String List	✓
query	String

Property query ∷ String

This entry is optional

Property type ∷ ThreatBrainSpecificationTypeString

This entry is required
- Must equal: "ThreatBrain"

Property variables ∷ String List

This entry is required
This entry's type is sequential (allows zero or more values)

SnortSpecification Object

SnortSpecification An indicator which runs in snort...

Property	Type	Description	Required?
snort_sig	String		✓
type	SnortSpecificationTypeString		✓

Property snort_sig ∷ String

This entry is required

Property type ∷ SnortSpecificationTypeString

This entry is required
- Must equal: "Snort"

SIOCSpecification Object

SIOCSpecification An indicator which runs in snort...

Property	Type	Description	Required?
SIOC	String		✓
type	SIOCSpecificationTypeString		✓

Property SIOC ∷ String

This entry is required

Property type ∷ SIOCSpecificationTypeString

This entry is required
- Must equal: "SIOC"

OpenIOCSpecification Object

OpenIOCSpecification An indicator which contains an XML blob of an openIOC indicator..

Property	Type	Description	Required?
open_IOC	String		✓
type	OpenIOCSpecificationTypeString		✓

Property open_IOC ∷ String

This entry is required

Property type ∷ OpenIOCSpecificationTypeString

This entry is required
- Must equal: "OpenIOC"

❮*Incident* Object *Judgement* Object❯

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