Suspicious UtilityFunctions.ps1 Proxy Dll (via process_creation)

title: Suspicious UtilityFunctions.ps1 Proxy Dll (via process_creation)
id: 693cd40f-ec0e-56b1-981d-12cb7019a54d
status: stable
description: This rule detects the use of a Microsoft signed script running a managed DLL with PowerShell.
references:
    - https://attack.mitre.org/techniques/T1216/
    - https://lolbas-project.github.io/lolbas/Scripts/UtilityFunctions/
author: Huntrule Team
date: 2026-02-06
tags:
    - attack.stealth
    - attack.t1216
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains:
            - 'UtilityFunctions.ps1'
            - 'RegSnapin '
    condition: selection
falsepositives:
    - Unknown
level: medium