Suspicious GoGRPC Screen Capture Log File Creation (via file_event)

PremiumReviewedSigma · Medium · v1
Product
windows
Category
file_event
Author
HuntRule
Published
2026-08-26
Updated
2026-08-28

ATT&CK techniques

Collection
  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. C2

  12. Exfiltration

  13. Impact

What it detects

This rule detects creation of the appscreen.log artifact under the ProgramData appscreen directory that the GoGRPC backdoor writes while capturing screen data. This specific path and filename combination is unique to the malware.

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Malicious RDP Shadow Session Configuration Enabled - Registry (via registry_event)
Suspicious Screen Capture via PowerShell Graphics API (via process_creation)
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Suspicious GoGRPC Screen Capture Log File Creation (via file_event)
Pivot detection · T1113 · 9 related

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