Lolbin Unregmp2.exe Use As Proxy — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: medium. Source dates: 2022-12-29 / 2024-06-04.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: a149690473bd53dd9dc720df07b44edb0daac6f0113387ab2381b107f8740a6d

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Lolbin Unregmp2.exe Use As Proxy
id: 727454c0-d851-48b0-8b89-385611ab0704
status: test
description: Detect usage of the "unregmp2.exe" binary as a proxy to launch a custom version of "wmpnscfg.exe"
references:
    - https://lolbas-project.github.io/lolbas/Binaries/Unregmp2/
author: frack113
date: 2022-12-29
modified: 2024-06-04
tags:
    - attack.stealth
    - attack.t1218
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\unregmp2.exe'
        - OriginalFileName: 'unregmp2.exe'
    selection_cmd:
        CommandLine|contains|windash: ' /HideWMP'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://lolbas-project.github.io/lolbas/Binaries/Unregmp2/