Microsoft Office DLL Sideload

 1title: Microsoft Office DLL Sideload
 2id: 829a3bdf-34da-4051-9cf4-8ed221a8ae4f
 3status: test
 4description: Detects DLL sideloading of DLLs that are part of Microsoft Office from non standard location
 5references:
 6    - https://hijacklibs.net/ # For list of DLLs that could be sideloaded (search for dlls mentioned here in there)
 7author: Nasreddine Bencherchali (Nextron Systems), Wietze Beukema (project and research)
 8date: 2022-08-17
 9modified: 2023-03-15
10tags:
11    - attack.defense-evasion
12    - attack.persistence
13    - attack.privilege-escalation
14    - attack.t1574.001
15    - attack.t1574.002
16logsource:
17    category: image_load
18    product: windows
19detection:
20    selection:
21        ImageLoaded|endswith: '\outllib.dll'
22    filter:
23        ImageLoaded|startswith:
24            - 'C:\Program Files\Microsoft Office\OFFICE'
25            - 'C:\Program Files (x86)\Microsoft Office\OFFICE'
26            - 'C:\Program Files\Microsoft Office\Root\OFFICE'
27            - 'C:\Program Files (x86)\Microsoft Office\Root\OFFICE'
28    condition: selection and not filter
29falsepositives:
30    - Unlikely
31level: high