Potentially Suspicious Execution Of Regasm/Regsvcs From Unusual Location (via process_creation)

title: Potentially Suspicious Execution Of Regasm/Regsvcs From Unusual Location (via process_creation)
id: 704a8922-da91-5961-ae44-3e5635aae024
status: stable
description: This rule detects potentially anomalous execution of the Regasm/Regsvcs utilities from a potentially anomalous location
references:
    - https://attack.mitre.org/techniques/T1218/009/
    - https://www.fortiguard.com/threat-signal-report/4718?s=09
    - https://lolbas-project.github.io/lolbas/Binaries/Regasm/
    - https://lolbas-project.github.io/lolbas/Binaries/Regsvcs/
author: Huntrule Team
date: 2026-01-16
tags:
    - attack.stealth
    - attack.t1218.009
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith:
              - '\Regsvcs.exe'
              - '\Regasm.exe'
        - OriginalFileName:
              - 'RegSvcs.exe'
              - 'RegAsm.exe'
    selection_dir:
        CommandLine|contains:
            - '\AppData\Local\Temp\'
            - '\Microsoft\Windows\Start Menu\Programs\Startup\'
            - '\PerfLogs\'
            - '\Users\Public\'
            - '\Windows\Temp\'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium