Judgement Object

Judgement A judgement about the intent or nature of an observable. For example, is it malicious, meaning is is malware and subverts system operations? It could also be clean and be from a known benign, or trusted source. It could also be common, something so widespread that it's not likely to be malicious.

Since a core goal of the CTIA is to provide a simple verdict service, these judgements are the basis for the returned verdicts. These are also the primary means by which users of the CTIA go from observables on their system, to the indicators and threat intelligence data in CTIA.

Property	Type	Description	Required?
confidence	HighMedLowString		✓
disposition	DispositionNumberInteger	Matches :disposition_name as in {1 "Clean", 2 "Malicious", 3 "Suspicious", 4 "Common", 5 "Unknown"}	✓
disposition_name	DispositionNameString		✓
id	String	Globally unique URI identifying this object.	✓
observable	Observable Object		✓
priority	Integer		✓
schema_version	String	CTIM schema version for this entity	✓
severity	SeverityString		✓
source	MedStringString		✓
type	JudgementTypeIdentifierString		✓
valid_time	ValidTime Object		✓
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.
language	ShortStringString	The human language this object is specified in.
reason	ShortStringString
reason_uri	String
revision	Integer	A monotonically increasing revision, incremented each time the object is changed.
source_uri	String
timestamp	Inst (Date)	The time this object was created at, or last modified.
tlp	TLPString	Specification for how, and to whom, this object can be shared.

Property confidence ∷ HighMedLowString

• This entry is required

  • Allowed Values:
    • High
    • Info
    • Low
    • Medium
    • None
    • Unknown
  • Reference: HighMedLowVocab

Property disposition ∷ DispositionNumberInteger

Matches :disposition_name as in {1 "Clean", 2 "Malicious", 3 "Suspicious", 4 "Common", 5 "Unknown"}

• This entry is required

  • DispositionNumber Numeric verdict identifiers
  • Allowed Values:
    • 1
    • 2
    • 3
    • 4
    • 5

Property disposition_name ∷ DispositionNameString

• This entry is required

  • DispositionName String verdict identifiers
  • Allowed Values:
    • Clean
    • Common
    • Malicious
    • Suspicious
    • Unknown

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 language ∷ ShortStringString

The human language this object is specified in.

• This entry is optional

  • ShortString String with at most 1024 characters

Property observable ∷ Observable Object

• This entry is required

• Observable Object Value
  • Details: Observable Object

Property priority ∷ Integer

• This entry is required

  • A value 0-100 that determine the priority of a judgement. Curated feeds of black/white lists, for example known good products within your organizations, should use a 95. All automated systems should use a priority of 90, or less. Human judgements should have a priority of 100, so that humans can always override machines.

Property reason ∷ ShortStringString

• This entry is optional

  • ShortString String with at most 1024 characters

Property reason_uri ∷ String

• This entry is optional

  • A URI

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 ∷ SeverityString

• This entry is required

  • Allowed Values:
    • Critical
    • High
    • Info
    • Low
    • Medium
    • None
    • Unknown

Property source ∷ MedStringString

• This entry is required

  • MedString String with at most 2048 characters

Property source_uri ∷ String

• This entry is optional

  • A URI

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 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 ∷ JudgementTypeIdentifierString

• This entry is required

  • Must equal: "judgement"

Property valid_time ∷ ValidTime Object

• 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

Observable Object

Observable A simple, atomic value which has a consistent identity, and is stable enough to be attributed an intent or nature. This is the classic 'indicator' which might appear in a data feed of bad IPs, or bad Domains. These do not exist as objects within the CTIA storage model, so you never create an observable.

Property	Type	Description	Required?
type	ObservableTypeIdentifierString		✓
value	String		✓

Property type ∷ ObservableTypeIdentifierString

• This entry is required

  • ObservableTypeIdentifier Observable type names
  • Allowed Values:
    • amp_computer_guid
    • certificate_common_name
    • certificate_issuer
    • certificate_serial
    • cisco_mid
    • cisco_uc_id
    • device
    • domain
    • email
    • email_messageid
    • email_subject
    • file_name
    • file_path
    • hostname
    • imei
    • imsi
    • ip
    • ipv6
    • mac_address
    • md5
    • ms_machine_id
    • mutex
    • ngfw_id
    • ngfw_name
    • odns_identity
    • odns_identity_label
    • orbital_node_id
    • pki_serial
    • process_name
    • registry_key
    • registry_name
    • registry_path
    • s1_agent_id
    • serial_number
    • sha1
    • sha256
    • swc_device_id
    • trend_micro_id
    • url
    • user
    • user_agent

Property value ∷ String

• This entry is required

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.