Detection rules › Sigma
Uncommon Child Processes Of SndVol.exe
Detects potentially uncommon child processes of SndVol.exe (the Windows volume mixer)
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | No specific technique |
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 Child Processes Of SndVol.exe
id: ba42babc-0666-4393-a4f7-ceaf5a69191e
status: test
description: Detects potentially uncommon child processes of SndVol.exe (the Windows volume mixer)
references:
- https://twitter.com/Max_Mal_/status/1661322732456353792
author: X__Junior (Nextron Systems)
date: 2023-06-09
tags:
- attack.execution
logsource:
product: windows
category: process_creation
detection:
selection:
ParentImage|endswith: '\SndVol.exe'
filter_main_rundll32:
Image|endswith: '\rundll32.exe'
CommandLine|contains: ' shell32.dll,Control_RunDLL '
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: '\SndVol.exe'
Stage 2: not filter_main_rundll32
filter_main_rundll32:
Image|endswith: '\rundll32.exe'
CommandLine|contains: ' shell32.dll,Control_RunDLL '
Exclusions
Top-level NOT(...) conjuncts: predicates this rule actively suppresses.
| Field | Kind | Excluded values |
|---|---|---|
CommandLine | match | shell32.dll,Control_RunDLL |
Image | ends_with | \rundll32.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 |
|