Possible FIN7 DGA Command and Control Behavioredit
This 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:
- packetbeat-*
- auditbeat-*
- filebeat-*
- logs-network_traffic.*
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:
- Use Case: Threat Detection
- Tactic: Command and Control
- Domain: Endpoint
Version: 105
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guideedit
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 queryedit
(event.dataset: (network_traffic.tls OR network_traffic.http) OR
(event.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/