Detectionhightest
Code Executed Via Office Add-in XLL File
Adversaries may abuse Microsoft Office add-ins to obtain persistence on a compromised system. Office add-ins can be used to add functionality to Office programs
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Log Source
WindowsPowerShell Script
ProductWindows← raw: windows
CategoryPowerShell Script← raw: ps_script
Definition
Requirements: Script Block Logging must be enabled
Detection Logic
Detection Logic1 selector
detection:
selection:
ScriptBlockText|contains|all:
- 'new-object '
- '-ComObject '
- '.application'
- '.RegisterXLL'
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
36fbec91-fa1b-4d5d-8df1-8d8edcb632ad
Status
test
Level
high
Type
Detection
Created
Tue Dec 28
Author
Path
rules/windows/powershell/powershell_script/posh_ps_office_comobject_registerxll.yml
Raw Tags
attack.persistenceattack.t1137.006