Detection rules › Sigma
Uncommon Sigverif.EXE Child Process
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.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth | T1216 System Script Proxy Execution |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
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
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_main_*Stage 1: selection
selection:
ParentImage|endswith: '\sigverif.exe'
Stage 2: not filter_main_werfault
filter_main_werfault:
Image:
- 'C:\Windows\System32\WerFault.exe'
- 'C:\Windows\SysWOW64\WerFault.exe'
Exclusions
Top-level NOT(...) conjuncts: predicates this rule actively suppresses.
| Field | Kind | Excluded values |
|---|---|---|
Image | eq | C:\Windows\SysWOW64\WerFault.exe |
Image | eq | C:\Windows\System32\WerFault.exe |
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
ParentImage | ends_with |
|