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Execution via Regsvcs/Regasm
editExecution via Regsvcs/Regasm
editRegSvcs.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-*
- logs-endpoint.events.*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
Tags:
- Elastic
- Windows
Version: 3 (version history)
Added (Elastic Stack release): 7.7.0
Last modified (Elastic Stack release): 7.9.1
Rule authors: Elastic
Rule license: Elastic License
Rule query
editevent.category:process and event.type:(start or process_started) and process.name:(RegAsm.exe or RegSvcs.exe)
Threat mapping
editFramework: 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/
Rule version history
edit- Version 3 (7.9.1 release)
-
- Formatting only
- Version 2 (7.9.0 release)
-
-
Updated query, changed from:
process.name:(RegAsm.exe or RegSvcs.exe) and event.action:"Process Create (rule: ProcessCreate)"
-