Detectionmediumtest
CLR DLL Loaded Via Office Applications
Detects CLR DLL being loaded by an Office Product
Convert In Phoenix Studio
Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.
Launch
Log Source
WindowsImage Load (DLL)
ProductWindows← raw: windows
CategoryImage Load (DLL)← raw: image_load
Detection Logic
Detection Logic1 selector
detection:
selection:
Image|endswith:
- '\excel.exe'
- '\mspub.exe'
- '\outlook.exe'
- '\onenote.exe'
- '\onenoteim.exe' # Just in case
- '\powerpnt.exe'
- '\winword.exe'
ImageLoaded|contains: '\clr.dll'
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
d13c43f0-f66b-4279-8b2c-5912077c1780
Status
test
Level
medium
Type
Detection
Created
Wed Feb 19
Modified
Wed Mar 29
Author
Path
rules/windows/image_load/image_load_office_dotnet_clr_dll_load.yml
Raw Tags
attack.executionattack.t1204.002