SigmaHQ/rules/windows/sysmon/sysmon_cmstp_execution.yml
2018-07-16 02:53:41 +03:00

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YAML

title: CMSTP Execution
status: experimental
description: Detects various indicators of Microsoft Connection Manager Profile Installer execution
author: Nik Seetharaman
status: Stable
references:
- http://www.endurant.io/cmstp/detecting-cmstp-enabled-code-execution-and-uac-bypass-with-sysmon/
logsource:
product: windows
service: sysmon
detection:
# CMSTP Spawning Child Process
selection1:
EventID: 1
ParentImage: '*\cmstp.exe'
# Registry Object Add
selection2:
EventID: 12
TargetObject: '*\cmmgr32.exe*'
# Registry Object Value Set
selection3:
EventID: 13
TargetObject: '*\cmmgr32.exe*'
# Process Access Call Trace
selection4:
EventID: 10
CallTrace: '*cmlua.dll*'
condition: 1 of them
fields:
- CommandLine
- ParentCommandLine
- Details
falsepositives:
- Legitimate CMSTP use (unlikely in modern enterprise environments)
level: high