Potential SNAKE Malware Persistence Service Execution

calendar Mar 1, 2024 · attack.execution detection.emerging_threats  ·
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Detects a specific child/parent process relationship indicative of a "WerFault" process running from the "WinSxS" as a service. This could be indicative of potential SNAKE malware activity as reported by CISA.

Sigma rule (View on GitHub)

 1title: Potential SNAKE Malware Persistence Service Execution
 2id: f7536642-4a08-4dd9-b6d5-c3286d8975ed
 3status: test
 4description: Detects a specific child/parent process relationship indicative of a "WerFault" process running from the "WinSxS" as a service. This could be indicative of potential SNAKE malware activity as reported by CISA.
 5references:
 6    - https://media.defense.gov/2023/May/09/2003218554/-1/-1/0/JOINT_CSA_HUNTING_RU_INTEL_SNAKE_MALWARE_20230509.PDF
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2023/05/04
 9tags:
10    - attack.execution
11    - detection.emerging_threats
12logsource:
13    category: process_creation
14    product: windows
15detection:
16    selection:
17        ParentImage|endswith: '\services.exe'
18        Image|startswith: 'C:\Windows\WinSxS\'
19        Image|endswith: '\WerFault.exe'
20    condition: selection
21falsepositives:
22    - Unknown
23level: high

References

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