Detection rules › Sigma
UtilityFunctions.ps1 Proxy Dll
Detects the use of a Microsoft signed script executing a managed DLL with PowerShell.
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: UtilityFunctions.ps1 Proxy Dll
id: 0403d67d-6227-4ea8-8145-4e72db7da120
status: test
description: Detects the use of a Microsoft signed script executing a managed DLL with PowerShell.
references:
- https://lolbas-project.github.io/lolbas/Scripts/UtilityFunctions/
author: frack113
date: 2022-05-28
tags:
- attack.stealth
- attack.t1216
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine|contains:
- 'UtilityFunctions.ps1'
- 'RegSnapin '
condition: selection
falsepositives:
- Unknown
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
CommandLine|contains:
- 'UtilityFunctions.ps1'
- 'RegSnapin '
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 |
|---|---|---|
CommandLine | match |
|