Potential Vivaldi_elf.DLL Sideloading — Sigma Rule

Rule metadata and linked tags

Author: X__Junior (Nextron Systems). Source status: test; severity: medium. Source dates: 2023-08-03 / not supplied.

{
  "category": "image_load",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 7abdf8ed3a5b6519fe199812f9f3d2361e3e6a1fba8637040e4f9f2817d7528e

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Potential Vivaldi_elf.DLL Sideloading
id: 2092cacb-d77b-4f98-ab0d-32b32f99a054
status: test
description: Detects potential DLL sideloading of "vivaldi_elf.dll"
references:
    - https://research.checkpoint.com/2023/beyond-the-horizon-traveling-the-world-on-camaro-dragons-usb-flash-drives/
author: X__Junior (Nextron Systems)
date: 2023-08-03
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

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://research.checkpoint.com/2023/beyond-the-horizon-traveling-the-world-on-camaro-dragons-usb-flash-drives/