Suspicious SysAidServer Child

Detects suspicious child processes of SysAidServer (as seen in MERCURY threat actor intrusions)

Sigma rule (View on GitHub)

 1title: Suspicious SysAidServer Child
 2id: 60bfeac3-0d35-4302-8efb-1dd16f715bc6
 3status: test
 4description: Detects suspicious child processes of SysAidServer (as seen in MERCURY threat actor intrusions)
 5references:
 6    - https://www.microsoft.com/security/blog/2022/08/25/mercury-leveraging-log4j-2-vulnerabilities-in-unpatched-systems-to-target-israeli-organizations/
 7author: Florian Roth (Nextron Systems)
 8date: 2022/08/26
 9tags:
10    - attack.lateral_movement
11    - attack.t1210
12logsource:
13    category: process_creation
14    product: windows
15detection:
16    selection:
17        ParentImage|endswith:
18            - '\java.exe'
19            - '\javaw.exe'
20        ParentCommandLine|contains: 'SysAidServer'
21    condition: selection
22falsepositives:
23    - Unknown
24level: medium

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