Possible WWlib.DLL Sideloading (via image_load)

title: Possible WWlib.DLL Sideloading (via image_load)
id: 1a16323a-542e-5dfe-87b9-9bd8c51c148f
status: stable
description: This rule detects potential DLL sideloading of "wwlib.dll"
references:
    - https://attack.mitre.org/techniques/T1574/001/
    - https://twitter.com/WhichbufferArda/status/1658829954182774784
    - https://news.sophos.com/en-us/2022/11/03/family-tree-dll-sideloading-cases-may-be-related/
    - https://securelist.com/apt-luminousmoth/103332/
author: Huntrule Team
date: 2026-02-06
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: image_load
    product: windows
detection:
    selection:
        ImageLoaded|endswith: '\wwlib.dll'
    filter_main_path:
        Image|startswith:
            - 'C:\Program Files (x86)\Microsoft Office\'
            - 'C:\Program Files\Microsoft Office\'
        Image|endswith: '\winword.exe'
        ImageLoaded|startswith:
            - 'C:\Program Files (x86)\Microsoft Office\'
            - 'C:\Program Files\Microsoft Office\'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: medium