Suspicious Assembly Loading Through CL_LoadAssembly.ps1 (via process_creation)

title: Suspicious Assembly Loading Through CL_LoadAssembly.ps1 (via process_creation)
id: 8d86a5e0-fa4a-5cb1-80fc-b8beff9594c4
status: stable
description: This rule detects calls to "LoadAssemblyFromPath" or "LoadAssemblyFromNS" that are part of the "CL_LoadAssembly.ps1" script. This can be misused to load different assemblies and bypass App locker controls.
references:
    - https://attack.mitre.org/techniques/T1216/
    - https://bohops.com/2018/01/07/executing-commands-and-bypassing-applocker-with-powershell-diagnostic-scripts/
    - https://lolbas-project.github.io/lolbas/Scripts/CL_LoadAssembly/
author: Huntrule Team
date: 2026-03-18
tags:
    - attack.stealth
    - attack.t1216
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains:
            - 'LoadAssemblyFromPath '
            - 'LoadAssemblyFromNS '
    condition: selection
falsepositives:
    - Unknown
level: medium