Detectionhightest
Microsoft Office DLL Sideload
Detects DLL sideloading of DLLs that are part of Microsoft Office from non standard location
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Launch
Nasreddine Bencherchali (Nextron Systems), Wietze Beukema (project and research)Created Wed Aug 17Updated Wed Mar 15829a3bdf-34da-4051-9cf4-8ed221a8ae4fwindows
Log Source
WindowsImage Load (DLL)
ProductWindows← raw: windows
CategoryImage Load (DLL)← raw: image_load
Detection Logic
Detection Logic2 selectors
detection:
selection:
ImageLoaded|endswith: '\outllib.dll'
filter:
ImageLoaded|startswith:
- 'C:\Program Files\Microsoft Office\OFFICE'
- 'C:\Program Files (x86)\Microsoft Office\OFFICE'
- 'C:\Program Files\Microsoft Office\Root\OFFICE'
- 'C:\Program Files (x86)\Microsoft Office\Root\OFFICE'
condition: selection and not filterFalse Positives
Unlikely
False positives are unlikely for most environments. High confidence detection.
References
MITRE ATT&CK
Rule Metadata
Rule ID
829a3bdf-34da-4051-9cf4-8ed221a8ae4f
Status
test
Level
high
Type
Detection
Created
Wed Aug 17
Modified
Wed Mar 15
Path
rules/windows/image_load/image_load_side_load_office_dlls.yml
Raw Tags
attack.defense-evasionattack.persistenceattack.privilege-escalationattack.t1574.001