Detection rules › Sigma
Arbitrary File Download Via GfxDownloadWrapper.EXE
Detects execution of GfxDownloadWrapper.exe with a URL as an argument to download file.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Command & Control |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
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
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_main_*Stage 1: selection
selection:
Image|endswith: '\GfxDownloadWrapper.exe'
CommandLine|contains:
- 'http://'
- 'https://'
Stage 2: not filter_main_known_urls
filter_main_known_urls:
CommandLine|contains: 'https://gameplayapi.intel.com/'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
CommandLine | match | https://gameplayapi.intel.com/ | excludes:CommandLine field:"CommandLine" value:"https://gameplayapi.intel.com/" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |
Image | ends_with |
| field:"Image" kind:ends_with value:"\GfxDownloadWrapper.exe" |