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 MSSQL xp_cmdshell Stored Procedure Exploit - Detected - Endpoint Security »

› › ›

Execution via Regsvcs/Regasm

edit

Execution via Regsvcs/Regasm

edit

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: 4 (version history)

Added (Elastic Stack release): 7.7.0

Last modified (Elastic Stack release): 7.10.0

Rule authors: Elastic

Rule license: Elastic License

Rule query

edit

event.category:process and event.type:(start or process_started) and
process.name:(RegAsm.exe or RegSvcs.exe)

Threat mapping

edit

Framework: MITRE ATT&CK^TM

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 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)"

« Execution via MSSQL xp_cmdshell Stored Procedure Exploit - Detected - Endpoint Security »