Suspicious Process Execution in PerfLogs Directory

 1title: Suspicious Process Execution in PerfLogs Directory
 2id: 82469ee5-ccf3-4669-9be6-31830f7ef3d7
 3status: experimental
 4description: Detects process execution in PerfLogs folder - a folder used by Windows for log collection - and matching previously-observed naming patterns for ransomware executables.
 5references:
 6    - https://www.microsoft.com/en-us/security/blog/2022/06/13/the-many-lives-of-blackcat-ransomware/
 7author: Micah Babinski
 8date: 2022/12/04
 9tags:
10    - attack.defense_evasion
11    - attack.t1564
12logsource:
13    category: process_creation
14    product: windows
15detection:
16    selection1:
17        ParentImage|contains: 'perflogs'
18    selection2:
19        ParentImage|re: '^.*\\[a-z]{3}\.exe'
20    condition: all of selection*
21falsepositives:
22    - Unknown
23level: high```

References

• The many lives of BlackCat ransomware | Microsoft Security Blog

  

  The use of an unconventional programming language, multiple target devices and possible entry points, and affiliation with prolific threat activity groups have made the BlackCat ransomware a prevalent threat and a prime example of the growing ransomware-as-a-service (RaaS) gig economy.

  
  Read More

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