Uncommon Sigverif.EXE Child Process

SIGMA detection rule by Nasreddine Bencherchali (Nextron Systems) · NOASSERTION

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.

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

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

2a544a04-0cb9-4ea4-a535-98dca8dfabdb

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

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