Possible CCleanerDU.DLL Sideloading (via image_load)

title: Possible CCleanerDU.DLL Sideloading (via image_load)
id: b6e85b3b-e2d6-50cd-9879-1fa166b0228f
status: stable
description: This rule detects potential DLL sideloading of "CCleanerDU.dll"
references:
    - https://attack.mitre.org/techniques/T1574/001/
    - https://lab52.io/blog/2344-2/
author: Huntrule Team
date: 2026-04-06
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: image_load
    product: windows
detection:
    selection:
        ImageLoaded|endswith: '\CCleanerDU.dll'
    filter_main_path:
        Image|startswith:
            - 'C:\Program Files\CCleaner\'
            - 'C:\Program Files (x86)\CCleaner\'
        Image|endswith:
            - '\CCleaner.exe'
            - '\CCleaner64.exe'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: medium