Possible Vivaldi_elf.DLL Sideloading (via image_load)

title: Possible Vivaldi_elf.DLL Sideloading (via image_load)
id: 24844ab8-8b4f-5527-869a-2c4bb32b49f4
status: stable
description: This rule detects potential DLL sideloading of "vivaldi_elf.dll"
references:
    - https://attack.mitre.org/techniques/T1574/001/
    - https://research.checkpoint.com/2023/beyond-the-horizon-traveling-the-world-on-camaro-dragons-usb-flash-drives/
author: Huntrule Team
date: 2026-05-19
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: image_load
    product: windows
detection:
    selection:
        ImageLoaded|endswith: '\vivaldi_elf.dll'
    filter_main_legit_path:
        Image|endswith: '\Vivaldi\Application\vivaldi.exe'
        ImageLoaded|contains: '\Vivaldi\Application\'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: medium