sigmamediumHunting

Suspicious SysAidServer Child

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

MITRE ATT&CK

lateral-movement

Detection Query

selection:
  ParentImage|endswith:
    - \java.exe
    - \javaw.exe
  ParentCommandLine|contains: SysAidServer
condition: selection

Author

Florian Roth (Nextron Systems)

Created

2022-08-26

Data Sources

windowsProcess Creation Events

Platforms

windows

References

https://www.microsoft.com/security/blog/2022/08/25/mercury-leveraging-log4j-2-vulnerabilities-in-unpatched-systems-to-target-israeli-organizations/

Tags

attack.lateral-movementattack.t1210

Raw Content

title: Suspicious SysAidServer Child
id: 60bfeac3-0d35-4302-8efb-1dd16f715bc6
status: test
description: Detects suspicious child processes of SysAidServer (as seen in MERCURY threat actor intrusions)
references:
    - https://www.microsoft.com/security/blog/2022/08/25/mercury-leveraging-log4j-2-vulnerabilities-in-unpatched-systems-to-target-israeli-organizations/
author: Florian Roth (Nextron Systems)
date: 2022-08-26
tags:
    - attack.lateral-movement
    - attack.t1210
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith:
            - '\java.exe'
            - '\javaw.exe'
        ParentCommandLine|contains: 'SysAidServer'
    condition: selection
falsepositives:
    - Unknown
level: medium