IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Possible FIN7 DGA Command and Control Behavior
editPossible FIN7 DGA Command and Control Behavior
editThis rule detects a known command and control pattern in network events. The FIN7 threat group is known to use this command and control technique, while maintaining persistence in their target’s network.
Rule type: query
Rule indices:
- auditbeat-*
- filebeat-*
- packetbeat-*
- logs-endpoint.events.*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Network
- Threat Detection
- Command and Control
- Host
Version: 6
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
edit## Triage and analysis In the event this rule identifies benign domains in your environment, the `destination.domain` field in the rule can be modified to include those domains. Example: `...AND NOT destination.domain:(zoom.us OR benign.domain1 OR benign.domain2)`.
Rule query
editevent.category:(network OR network_traffic) AND type:(tls OR http) AND network.transport:tcp
AND destination.domain:/[a-zA-Z]{4,5}\.(pw|us|club|info|site|top)/ AND NOT destination.domain:zoom.us
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Command and Control
- ID: TA0011
- Reference URL: https://attack.mitre.org/tactics/TA0011/
-
Technique:
- Name: Application Layer Protocol
- ID: T1071
- Reference URL: https://attack.mitre.org/techniques/T1071/
-
Technique:
- Name: Dynamic Resolution
- ID: T1568
- Reference URL: https://attack.mitre.org/techniques/T1568/
-
Sub-technique:
- Name: Domain Generation Algorithms
- ID: T1568.002
- Reference URL: https://attack.mitre.org/techniques/T1568/002/