IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Cobalt Strike Command and Control Beacon

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Cobalt Strike Command and Control Beacon

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Cobalt Strike is a threat emulation platform commonly modified and used by adversaries to conduct network attack and exploitation campaigns. This rule detects a network activity algorithm leveraged by Cobalt Strike implant beacons for command and control.

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 guide

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Threat intel

This activity has been observed in FIN7 campaigns.

Rule query

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((event.category: (network OR network_traffic) AND type: (tls OR http))
    OR event.dataset: (network_traffic.tls OR network_traffic.http)
) AND destination.domain:/[a-z]{3}.stage.[0-9]{8}\..*/

Framework: MITRE ATT&CK^TM

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/

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