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-*
- 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
- Host
- Windows
- Threat Detection
- Execution
Version: 6 (version history)
Added (Elastic Stack release): 7.7.0
Last modified (Elastic Stack release): 7.11.2
Rule authors: Elastic
Rule license: Elastic License
Rule queryedit
event.category:process and event.type:(start or process_started) and process.name:(RegAsm.exe or RegSvcs.exe)
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Signed Binary Proxy Execution
- ID: T1218
- Reference URL: https://attack.mitre.org/techniques/T1218/
Rule version historyedit
- Version 6 (7.11.2 release)
-
- Formatting only
- Version 5 (7.11.0 release)
-
- Formatting only
- Version 4 (7.10.0 release)
-
- Formatting only
- 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)"
-