Uncommon Sigverif.EXE Child Process — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: medium. Source dates: 2022-08-19 / 2024-08-27.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 983e382eacbcc32d1258261883bcfbe94c6b76d4a41a7c7f9ad7a9d9c7f3d9c9

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: Uncommon Sigverif.EXE Child Process
id: 7d4aaec2-08ed-4430-8b96-28420e030e04
status: test
description: |
    Detects uncommon child processes spawning from "sigverif.exe", which could indicate potential abuse of the latter as a living of the land binary in order to proxy execution.
references:
    - https://www.hexacorn.com/blog/2018/04/27/i-shot-the-sigverif-exe-the-gui-based-lolbin/
    - https://twitter.com/0gtweet/status/1457676633809330184
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-08-19
modified: 2024-08-27
tags:
    - attack.stealth
    - attack.t1216
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\sigverif.exe'
    filter_main_werfault:
        Image:
            - 'C:\Windows\System32\WerFault.exe'
            - 'C:\Windows\SysWOW64\WerFault.exe'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.hexacorn.com/blog/2018/04/27/i-shot-the-sigverif-exe-the-gui-based-lolbin/
• https://twitter.com/0gtweet/status/1457676633809330184