Regsvr32 Execution From Possible Suspicious Location (via process_creation)

title: Regsvr32 Execution From Possible Suspicious Location (via process_creation)
id: 971c7e7d-14fa-53fd-af7e-423d3a997e54
status: stable
description: This rule detects execution of regsvr32 where the DLL is located in a potentially anomalous location.
references:
    - https://attack.mitre.org/techniques/T1218/010/
    - https://web.archive.org/web/20171001085340/https://subt0x10.blogspot.com/2017/04/bypass-application-whitelisting-script.html
    - https://app.any.run/tasks/34221348-072d-4b70-93f3-aa71f6ebecad/
author: Huntrule Team
date: 2026-07-13
tags:
    - attack.stealth
    - attack.t1218.010
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\regsvr32.exe'
        - OriginalFileName: 'REGSVR32.EXE'
    selection_cli:
        CommandLine|contains:
            - ':\ProgramData\'
            - ':\Temp\'
            - ':\Users\Public\'
            - ':\Windows\Temp\'
            - '\AppData\Local\Temp\'
            - '\AppData\Roaming\'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium