Suspicious Third Party Software DLL Sideloading (via image_load)

title: Suspicious Third Party Software DLL Sideloading (via image_load)
id: 3579abcd-5e03-574e-8bb0-41e789b90bc6
status: stable
description: This rule detects DLL sideloading of DLLs that are part of third party software (zoom, discord....etc)
references:
    - https://attack.mitre.org/techniques/T1574/001/
    - https://hijacklibs.net/
author: Huntrule Team
date: 2026-02-23
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: image_load
    product: windows
detection:
    selection_lenovo:
        ImageLoaded|endswith: '\commfunc.dll'
    filter_lenovo:
        - ImageLoaded|contains: '\AppData\local\Google\Chrome\Application\'
        - ImageLoaded|startswith:
              - 'C:\Program Files\Lenovo\Communications Utility\'
              - 'C:\Program Files (x86)\Lenovo\Communications Utility\'
    selection_toshiba:
        ImageLoaded|endswith: '\tosbtkbd.dll'
    filter_toshiba:
        ImageLoaded|startswith:
            - 'C:\Program Files\Toshiba\Bluetooth Toshiba Stack\'
            - 'C:\Program Files (x86)\Toshiba\Bluetooth Toshiba Stack\'
    condition: (selection_lenovo and not filter_lenovo) or (selection_toshiba and not filter_toshiba)
falsepositives:
    - Unknown
level: medium