IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Execution via Regsvcs/Regasmedit
RegSvcs.exe
and RegAsm.exe
are Windows command line utilities that are used
to register .NET Component Object Model (COM) assemblies. Adversaries can use
RegSvcs.exe
and RegAsm.exe
to proxy execution of code through a trusted
Windows utility.
Rule type: query
Rule indices:
- winlogbeat-*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-6m (Date Math format, see also Additional look-back time
)
Maximum signals per execution: 100
Tags:
- Elastic
- Windows
Version: 1
Added (Elastic Stack release): 7.7.0
Rule queryedit
process.name:(RegAsm.exe or RegSvcs.exe) and event.action:"Process Create (rule: ProcessCreate)"
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: Regsvcs/Regasm
- ID: T1121
- Reference URL: https://attack.mitre.org/techniques/T1121/
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Regsvcs/Regasm
- ID: T1121
- Reference URL: https://attack.mitre.org/techniques/T1121/