huntrule

Windows Arbitrary File Download via GfxDownloadWrapper.exe URL Argument Execution

Flags GfxDownloadWrapper.exe executions that include http/https URLs for downloading files, excluding a known Intel gameplay API URL.

FreeReviewedSigma · Medium · v2
Product
windows
Category
process_creation
Author
Victor Sergeev, oscd.community (SigmaHQ), DRL 1.1
Published
2020-10-09
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

C2

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule matches process creation where GfxDownloadWrapper.exe is executed with a command line containing an HTTP or HTTPS URL. Such behavior can be used to retrieve external payloads or stages from attacker-controlled infrastructure. The detection relies on Windows process creation telemetry, specifically the executable path and command-line contents.

Reporting behind it

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Suspicious CloudZ RAT Payload Download via curl to ProgramData
Suspicious Velociraptor Agent Deployment via msiexec From Cloud Storage
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Windows Arbitrary File Download via GfxDownloadWrapper.exe URL Argument Execution
Pivot detection · T1105 · 9 related

Changelog

v2
  1. v2
    Candidate ingested via manual entry.2026-07-31
  2. v1
    No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.