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:

  • 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

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

Framework: MITRE ATT&CKTM