Detectionmediumtest
Assembly Loading Via CL_LoadAssembly.ps1
Detects calls to "LoadAssemblyFromPath" or "LoadAssemblyFromNS" that are part of the "CL_LoadAssembly.ps1" script. This can be abused to load different assemblies and bypass App locker controls.
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Launch
François Hubaut, Nasreddine Bencherchali (Nextron Systems)Created Sat May 21Updated Thu Aug 17c57872c7-614f-4d7f-a40d-b78c8df2d30dwindows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic1 selector
detection:
selection:
# Note: As this function is usually called from within powershell, classical process creation even would not catch it. This will only catch inline calls via "-Command" or "-ScriptBlock" flags for example.
CommandLine|contains:
- 'LoadAssemblyFromPath '
- 'LoadAssemblyFromNS '
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Tactics
Techniques
Rule Metadata
Rule ID
c57872c7-614f-4d7f-a40d-b78c8df2d30d
Status
test
Level
medium
Type
Detection
Created
Sat May 21
Modified
Thu Aug 17
Path
rules/windows/process_creation/proc_creation_win_powershell_cl_loadassembly.yml
Raw Tags
attack.defense-evasionattack.t1216