Arbitrary File Download Via GfxDownloadWrapper.EXE — Sigma Rule

Rule metadata and linked tags

Author: Victor Sergeev, oscd.community. Source status: test; severity: medium. Source dates: 2020-10-09 / 2023-10-18.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 2fe29bf225b389b7bdc2a45fc014e469a57a13b5eb8bdd2934819ba4c19ffa24

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: Arbitrary File Download Via GfxDownloadWrapper.EXE
id: eee00933-a761-4cd0-be70-c42fe91731e7
status: test
description: Detects execution of GfxDownloadWrapper.exe with a URL as an argument to download file.
references:
    - https://lolbas-project.github.io/lolbas/HonorableMentions/GfxDownloadWrapper/
author: Victor Sergeev, oscd.community
date: 2020-10-09
modified: 2023-10-18
tags:
    - attack.command-and-control
    - attack.t1105
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\GfxDownloadWrapper.exe'
        CommandLine|contains:
            - 'http://'
            - 'https://'
    filter_main_known_urls:
        CommandLine|contains: 'https://gameplayapi.intel.com/'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://lolbas-project.github.io/lolbas/HonorableMentions/GfxDownloadWrapper/