Possible ReflectDebugger Content Execution Through WerFault.EXE (via process_creation)

title: Possible ReflectDebugger Content Execution Through WerFault.EXE (via process_creation)
id: dc65c8b3-7dec-5220-bd99-967f0c17bc46
status: stable
description: This rule detects execution of "WerFault.exe" with the "-pr" commandline flag that is leveraged to run files stored in the ReflectDebugger key which could be used to store the path to the malware to masquerade the execution flow
references:
    - https://attack.mitre.org/techniques/T1036/
    - https://cocomelonc.github.io/malware/2022/11/02/malware-pers-18.html
    - https://www.hexacorn.com/blog/2018/08/31/beyond-good-ol-run-key-part-85/
author: Huntrule Team
date: 2026-04-11
tags:
    - attack.execution
    - attack.stealth
    - attack.t1036
logsource:
    product: windows
    category: process_creation
detection:
    selection_img:
        - Image|endswith: '\WerFault.exe'
        - OriginalFileName: 'WerFault.exe'
    selection_cli:
        CommandLine|contains: ' -pr '
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium