SSH Activity

ssh_activity

SSH Activity events report remote client connections to a server using the Secure Shell (SSH) Protocol.

Attributes

CaptionNameTypeDescription
ActionactionString

The normalized caption of action_id.

Action IDaction_idInteger

The action taken by a control or other policy-based system leading to an outcome or disposition. An unknown action may still correspond to a known disposition. Refer to disposition_id for the outcome of the action.

  • 0: Unknown (UNKNOWN)
  • 1: Allowed (ALLOWED)
  • 2: Denied (DENIED)
  • 3: Observed (OBSERVED)
  • 4: Modified (MODIFIED)
  • 99: Other (OTHER)
Activity IDactivity_idInteger

Group:classification
The normalized identifier of the activity that triggered the event.

  • 0: Unknown (UNKNOWN)
  • 1: Open (OPEN)
  • 2: Close (CLOSE)
  • 3: Reset (RESET)
  • 4: Fail (FAIL)
  • 5: Refuse (REFUSE)
  • 6: Traffic (TRAFFIC)
  • 7: Listen (LISTEN)
  • 99: Other (OTHER)
Activityactivity_nameString

Group:classification
The event activity name, as defined by the activity_id.

ActoractorActor[]

The actor object describes details about the user/role/process that was the source of the activity. Note that this is not the threat actor of a campaign but may be part of a campaign.

API DetailsapiAPI[]

Group:context
Describes details about a typical API (Application Programming Interface) call.

Application Nameapp_nameString

Group:context
The name of the application associated with the event or object.

MITRE ATT&CK® DetailsattacksMITRE ATT&CK®[]

An array of MITRE ATT&CK® objects describing identified tactics, techniques & sub-techniques.

Authentication Typeauth_typeString

Group:primary
The SSH authentication type, normalized to the caption of 'auth_type_id'. In the case of 'Other', it is defined by the event source.

Authentication Type IDauth_type_idInteger

Group:primary
The normalized identifier of the SSH authentication type.

  • 0: Unknown (UNKNOWN)
  • 1: Certificate Based (CERTIFICATE_BASED)
  • 2: GSSAPI (GSSAPI)
  • 3: Host Based (HOST_BASED)
  • 4: Keyboard Interactive (KEYBOARD_INTERACTIVE)
  • 5: Password (PASSWORD)
  • 6: Public Key (PUBLIC_KEY)
  • 99: Other (OTHER)
Authorization InformationauthorizationsAuthorization Result[]

Provides details about an authorization, such as authorization outcome, and any associated policies related to the activity/event.

Categorycategory_nameString

Group:classification
The event category name, as defined by category_uid value.

Category IDcategory_uidInteger

Group:classification
The category unique identifier of the event.

  • 4: Network Activity (NETWORK_ACTIVITY)
Classclass_nameString

Group:classification
The event class name, as defined by class_uid value.

Class IDclass_uidInteger

Group:classification
The unique identifier of a class. A class describes the attributes available in an event.

  • 4007: SSH Activity (SSH_ACTIVITY)
Client HASSHclient_hasshHASSH[]

Group:primary
The Client HASSH fingerprinting object.

CloudcloudCloud[]

Group:primary
Describes details about the Cloud environment where the event was originally created or logged.

ConfidenceconfidenceString

Group:context
The confidence, normalized to the caption of the confidence_id value. In the case of 'Other', it is defined by the event source.

Confidence IDconfidence_idInteger

Group:context
The normalized confidence refers to the accuracy of the rule that created the finding. A rule with a low confidence means that the finding scope is wide and may create finding reports that may not be malicious in nature.

  • 0: Unknown (UNKNOWN)
  • 1: Low (LOW)
  • 2: Medium (MEDIUM)
  • 3: High (HIGH)
  • 99: Other (OTHER)
Confidence Scoreconfidence_scoreInteger

Group:context
The confidence score as reported by the event source.

Connection Infoconnection_infoNetwork Connection Information[]

Group:primary
The network connection information.

CountcountInteger

Group:occurrence
The number of times that events in the same logical group occurred during the event Start Time to End Time period.

DevicedeviceDevice[]

An addressable device, computer system or host.

DispositiondispositionString

The disposition name, normalized to the caption of the disposition_id value. In the case of 'Other', it is defined by the event source.

Disposition IDdisposition_idInteger

Describes the outcome or action taken by a security control, such as access control checks, malware detections or various types of policy violations.

  • 0: Unknown (UNKNOWN)
  • 1: Allowed (ALLOWED)
  • 10: Exonerated (EXONERATED)
  • 11: Corrected (CORRECTED)
  • 12: Partially Corrected (PARTIALLY_CORRECTED)
  • 13: Uncorrected (UNCORRECTED)
  • 14: Delayed (DELAYED)
  • 15: Detected (DETECTED)
  • 16: No Action (NO_ACTION)
  • 17: Logged (LOGGED)
  • 18: Tagged (TAGGED)
  • 19: Alert (ALERT)
  • 2: Blocked (BLOCKED)
  • 20: Count (COUNT)
  • 21: Reset (RESET)
  • 22: Captcha (CAPTCHA)
  • 23: Challenge (CHALLENGE)
  • 24: Access Revoked (ACCESS_REVOKED)
  • 25: Rejected (REJECTED)
  • 26: Unauthorized (UNAUTHORIZED)
  • 27: Error (ERROR)
  • 3: Quarantined (QUARANTINED)
  • 4: Isolated (ISOLATED)
  • 5: Deleted (DELETED)
  • 6: Dropped (DROPPED)
  • 7: Custom Action (CUSTOM_ACTION)
  • 8: Approved (APPROVED)
  • 9: Restored (RESTORED)
  • 99: Other (OTHER)
Destination Endpointdst_endpointNetwork Endpoint[]

Group:primary
The responder (server) in a network connection.

Duration MillisecondsdurationLong

Group:occurrence
The event duration or aggregate time, the amount of time the event covers from start_time to end_time in milliseconds.

End Timeend_timeTimestamp

Group:occurrence
The end time of a time period, or the time of the most recent event included in the aggregate event.

EnrichmentsenrichmentsEnrichment[]

Group:context
The additional information from an external data source, which is associated with the event or a finding.
For example, add location information for the IP address in the DNS answers:

[
  {
    "name": "answers.ip",
    "value": "92.24.47.250",
    "type": "location",
    "data": {
      "city": "Socotra",
      "continent": "Asia",
      "coordinates": [-25.4153, 17.0743],
      "country": "YE",
      "desc": "Yemen"
    }
  }
]
FilefileFile[]

Entity:FILE
Group:context
The file that is the target of the SSH activity.

Firewall Rulefirewall_ruleFirewall Rule[]

The firewall rule that pertains to the control that triggered the event, if applicable.

Alertis_alertBoolean

Indicates that the event is considered to be an alertable signal. Should be set to true if disposition_id = Alert among other dispositions, and/or risk_level_id or severity_id of the event is elevated. Not all control events will be alertable, for example if disposition_id = Exonerated or disposition_id = Allowed.

JA4+ Fingerprintsja4_fingerprint_listJA4+ Fingerprint[]

Group:context
A list of the JA4+ network fingerprints.

Load Balancerload_balancerLoad Balancer[]

The Load Balancer object contains information related to the device that is distributing incoming traffic to specified destinations.

MalwaremalwareMalware[]

A list of Malware objects, describing details about the identified malware.

MessagemessageString

Group:primary
The description of the event/finding, as defined by the source.

MetadatametadataMetadata[]

Group:context
The metadata associated with the event or a finding.

ObservablesobservablesObservable[]

Group:primary
The observables associated with the event or a finding.

OSINTosintOSINT[]

Group:primary
The OSINT (Open Source Intelligence) object contains details related to an indicator such as the indicator itself, related indicators, geolocation, registrar information, subdomains, analyst commentary, and other contextual information. This information can be used to further enrich a detection or finding by providing decisioning support to other analysts and engineers.

PolicypolicyPolicy[]

The policy that pertains to the control that triggered the event, if applicable. For example the name of an anti-malware policy or an access control policy.

SSH Versionprotocol_verString

Group:context
The Secure Shell Protocol version.

ProxyproxyNetwork Proxy Endpoint[]

Group:primary
The proxy (server) in a network connection.

🚧 WARNING: DEPRECATED

Proxy has been deprecated since 1.1.0. Use the proxy_endpoint attribute instead.

Proxy Connection Infoproxy_connection_infoNetwork Connection Information[]

The connection information from the proxy server to the remote server.

Proxy Endpointproxy_endpointNetwork Proxy Endpoint[]

The proxy (server) in a network connection.

Proxy HTTP Requestproxy_http_requestHTTP Request[]

The HTTP Request from the proxy server to the remote server.

Proxy HTTP Responseproxy_http_responseHTTP Response[]

The HTTP Response from the remote server to the proxy server.

Proxy TLSproxy_tlsTransport Layer Security (TLS)[]

The TLS protocol negotiated between the proxy server and the remote server.

Proxy Trafficproxy_trafficNetwork Traffic[]

The network traffic refers to the amount of data moving across a network, from proxy to remote server at a given point of time.

Raw Dataraw_dataJSON

Group:context
The event data as received from the event source.

Record IDrecord_idString

Group:primary
Unique idenifier for the event

Risk Detailsrisk_detailsString

Group:context
Describes the risk associated with the finding.

Risk Levelrisk_levelString

Group:context
The risk level, normalized to the caption of the risk_level_id value.

Risk Level IDrisk_level_idInteger

Group:context
The normalized risk level id.

  • 0: Info (INFO)
  • 1: Low (LOW)
  • 2: Medium (MEDIUM)
  • 3: High (HIGH)
  • 4: Critical (CRITICAL)
  • 99: Other (OTHER)
Risk Scorerisk_scoreInteger

Group:context
The risk score as reported by the event source.

Server HASSHserver_hasshHASSH[]

Group:primary
The Server HASSH fingerprinting object.

SeverityseverityString

Group:classification
The event/finding severity, normalized to the caption of the severity_id value. In the case of 'Other', it is defined by the source.

Severity IDseverity_idInteger

Group:classification

The normalized identifier of the event/finding severity.

The normalized severity is a measurement the effort and expense required to manage and resolve an event or incident. Smaller numerical values represent lower impact events, and larger numerical values represent higher impact events.

  • 0: Unknown (UNKNOWN)
  • 1: Informational (INFORMATIONAL)
  • 2: Low (LOW)
  • 3: Medium (MEDIUM)
  • 4: High (HIGH)
  • 5: Critical (CRITICAL)
  • 6: Fatal (FATAL)
  • 99: Other (OTHER)
Source Endpointsrc_endpointNetwork Endpoint[]

Group:primary
The initiator (client) of the network connection.

Start Timestart_timeTimestamp

Group:occurrence
The start time of a time period, or the time of the least recent event included in the aggregate event.

StatusstatusString

Group:primary
The event status, normalized to the caption of the status_id value. In the case of 'Other', it is defined by the event source.

Status Codestatus_codeString

Group:primary
The event status code, as reported by the event source.

For example, in a Windows Failed Authentication event, this would be the value of 'Failure Code', e.g. 0x18.

Status Detailstatus_detailString

Group:primary
The status detail contains additional information about the event/finding outcome.

Status IDstatus_idInteger

Group:primary
The normalized identifier of the event status.

  • 0: Unknown (UNKNOWN)
  • 1: Success (SUCCESS)
  • 2: Failure (FAILURE)
  • 99: Other (OTHER)
Event TimetimeTimestamp

Group:occurrence
The normalized event occurrence time or the finding creation time.

Timezone Offsettimezone_offsetInteger

Group:occurrence
The number of minutes that the reported event time is ahead or behind UTC, in the range -1,080 to +1,080.

TLStlsTransport Layer Security (TLS)[]

Group:context
The Transport Layer Security (TLS) attributes.

TraffictrafficNetwork Traffic[]

Group:primary
The network traffic refers to the amount of data moving across a network at a given point of time. Intended to be used alongside Network Connection.

Type Nametype_nameString

Group:classification
The event/finding type name, as defined by the type_uid.

Type IDtype_uidLong

Group:classification
The event/finding type ID. It identifies the event's semantics and structure. The value is calculated by the logging system as: class_uid * 100 + activity_id.

  • 400700: SSH Activity: Unknown (SSH_ACTIVITY_UNKNOWN)
  • 400701: SSH Activity: Open (SSH_ACTIVITY_OPEN)
  • 400702: SSH Activity: Close (SSH_ACTIVITY_CLOSE)
  • 400703: SSH Activity: Reset (SSH_ACTIVITY_RESET)
  • 400704: SSH Activity: Fail (SSH_ACTIVITY_FAIL)
  • 400705: SSH Activity: Refuse (SSH_ACTIVITY_REFUSE)
  • 400706: SSH Activity: Traffic (SSH_ACTIVITY_TRAFFIC)
  • 400707: SSH Activity: Listen (SSH_ACTIVITY_LISTEN)
  • 400799: SSH Activity: Other (SSH_ACTIVITY_OTHER)
UnmappedunmappedUnmapped[]

Group:context
Data from the source that was not mapped into the schema.

Relationships

SSH Activity shown in context

Outbound Relationships

SSH Activity references the following objects and events in its attributes:

This page describes ocsf-1.4.0