huntrule

Windows Process Creation: 3CXDesktopApp Execution from Known Compromised Hashes

Alerts when 3CXDesktopApp.exe executes on Windows with hash/version indicators matching known compromised binaries.

FreeReviewedSigma · High · v5
Product
windows
Category
process_creation
Author
Nasreddine Bencherchali (Nextron Systems) (SigmaHQ), DRL 1.1
Published
2023-03-29
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Defense Evasion

  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 flags Windows executions of 3CX Desktop App when the process image hash and file metadata match a set of known compromised version artifacts. Attackers may leverage trojanized or tampered installer/executable files to establish persistence or run malicious payloads under a trusted application name. The detection relies on process creation telemetry including image file hashes and basic PE attributes such as original filename, product string, and file version patterns.

Reporting behind it

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Windows Process Creation: 3CXDesktopApp Execution from Known Compromised Hashes
Pivot detection · T1218 · 9 related

Changelog

v5
  1. v5
    Candidate ingested via manual entry.2026-07-31
  2. v4
    Candidate ingested via manual entry.2026-07-31
  3. v3
    Candidate ingested via manual entry.2026-07-31
  4. v2
    Candidate ingested via manual entry.2026-07-31
  5. 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.