Potential WWlib.DLL Sideloading

calendar May 15, 2025 · attack.defense-evasion attack.privilege-escalation attack.t1574.001  ·
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Detects potential DLL sideloading of "wwlib.dll"

Sigma rule (View on GitHub)

 1title: Potential WWlib.DLL Sideloading
 2id: e2e01011-5910-4267-9c3b-4149ed5479cf
 3status: test
 4description: Detects potential DLL sideloading of "wwlib.dll"
 5references:
 6    - https://twitter.com/WhichbufferArda/status/1658829954182774784
 7    - https://news.sophos.com/en-us/2022/11/03/family-tree-dll-sideloading-cases-may-be-related/
 8    - https://securelist.com/apt-luminousmoth/103332/
 9author: X__Junior (Nextron Systems)
10date: 2023-05-18
11tags:
12    - attack.defense-evasion
13    - attack.privilege-escalation
14    - attack.t1574.001
15logsource:
16    category: image_load
17    product: windows
18detection:
19    selection:
20        ImageLoaded|endswith: '\wwlib.dll'
21    filter_main_path:
22        Image|startswith:
23            - 'C:\Program Files (x86)\Microsoft Office\'
24            - 'C:\Program Files\Microsoft Office\'
25        Image|endswith: '\winword.exe'
26        ImageLoaded|startswith:
27            - 'C:\Program Files (x86)\Microsoft Office\'
28            - 'C:\Program Files\Microsoft Office\'
29    condition: selection and not 1 of filter_main_*
30falsepositives:
31    - Unknown
32level: medium

References

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