Suspicious Cobalt Strike DNS Beaconing - Sysmon

 1title: Suspicious Cobalt Strike DNS Beaconing - Sysmon
 2id: f356a9c4-effd-4608-bbf8-408afd5cd006
 3related:
 4    - id: 0d18728b-f5bf-4381-9dcf-915539fff6c2
 5      type: similar
 6status: test
 7description: Detects a program that invoked suspicious DNS queries known from Cobalt Strike beacons
 8references:
 9    - https://www.icebrg.io/blog/footprints-of-fin7-tracking-actor-patterns
10    - https://www.sekoia.io/en/hunting-and-detecting-cobalt-strike/
11author: Florian Roth (Nextron Systems)
12date: 2021-11-09
13modified: 2023-01-16
14tags:
15    - attack.command-and-control
16    - attack.t1071.004
17logsource:
18    product: windows
19    category: dns_query
20detection:
21    selection1:
22        QueryName|startswith:
23            - 'aaa.stage.'
24            - 'post.1'
25    selection2:
26        QueryName|contains: '.stage.123456.'
27    condition: 1 of selection*
28falsepositives:
29    - Unknown
30fields:
31    - Image
32    - CommandLine
33level: critical

References

• https://www.icebrg.io/blog/footprints-of-fin7-tracking-actor-patterns

  
  Read More

• Hunting and detecting Cobalt Strike

  

  In this blogpost, we describe step by step how to ensure a proactive and defensive posture against Cobalt Strike.

  
  Read More

Related rules

• Cobalt Strike DNS Beaconing
• DNS Exfiltration and Tunneling Tools Execution
• DNS TXT Answer with Possible Execution Strings
• OilRig APT Activity
• OilRig APT Registry Persistence