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-*

Severity: high

Risk score: 73

Runs every: 5 minutes

Searches indices from: now-6m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Elastic
Network
Threat Detection
Command and Control

Version: 1

Added (Elastic Stack release): 7.10.0

Rule authors: Elastic

Rule license: Elastic License

Potential false positives

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This rule should be tailored to either exclude systems, as sources or destinations, in which this behavior is expected.

Investigation guide

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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) AND
network.transport:tcp AND
destination.domain:/[a-z]{3}.stage.[0-9]{8}\..*/

Threat mapping

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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/

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