Potential Raspberry Robin Aclui Dll SideLoading

title: Potential Raspberry Robin Aclui Dll SideLoading
id: 0f3a9db2-c17a-480e-a723-d1f1c547ab6a
status: test
description: |
    Detects potential sideloading of malicious "aclui.dll" by OleView.This behavior was observed in Raspberry-Robin variants reported by chekpoint research on Feburary 2024.
references:
    - https://research.checkpoint.com/2024/raspberry-robin-keeps-riding-the-wave-of-endless-1-days/
    - https://globetech.biz/index.php/2023/05/19/evading-edr-by-dll-sideloading-in-csharp/
    - https://decoded.avast.io/threatintel/apt-treasure-trove-avast-suspects-chinese-apt-group-mustang-panda-is-collecting-data-from-burmese-government-agencies-and-opposition-groups/
    - https://www.hexacorn.com/blog/2016/03/10/beyond-good-ol-run-key-part-36/
    - https://strontic.github.io/xcyclopedia/library/aclui.dll-F883E9CA757B622B032FDCA5BF33D0DF.html
author: Swachchhanda Shrawan Poudel
date: 2024-07-31
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
    - detection.emerging-threats
logsource:
    category: image_load
    product: windows
detection:
    selection:
        Image|endswith: '\OleView.exe'
        ImageLoaded|endswith: '\aclui.dll'
    filter_main_legit_oleview_paths:
        Image|startswith:
            - 'C:\Program Files (x86)\Windows Kits\'
            - 'C:\Program Files\Microsoft SDKs\'
    filter_optional_known_oleview_paths:
        Image|contains: '\Windows Resource Kit\'
    filter_main_is_signed:
        Signed: 'true'
    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*
falsepositives:
    - Unknown
level: high