Suspicious InvisibleFerret C2 Endpoints over Port 1224 (via proxy)

PremiumReviewedSigma · High · v1
Category
proxy
Author
HuntRule
Published
2026-07-19
Updated
2026-08-28

ATT&CK techniques

Exfiltration
  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. Impact

What it detects

This rule detects HTTP requests to the InvisibleFerret command and control server that exposes payload, browser, clipboard and key exfiltration endpoints over TCP port 1224. The Lazarus backdoor cycles through fixed URI paths such as payload, brow, mclip and keys on this port. The pairing of the non-standard port with these named resources reveals the backdoor traffic.

Related detections9 linkedT1041 — drag to rearrange
Malicious AWS Credential Exfiltration via Curl or Wget in Process Creation
Malicious curl Exfiltration to Attacker Upload Endpoint on macOS (via process_creation)
Suspicious Outlook Process Spawning Network Utilities for NotDoor C2 (via process_creation)
Possible FakeWallet Wallet Exfiltration via Structured POST Parameters (via proxy)
Malicious FakeWallet Crypto Stealer C2 via Rsakey Endpoints (via proxy)
Possible Malicious MCP Server Credential Exfiltration via DevTools-Assistant Agent (via proxy)
Suspicious curl POST Exfiltration of Archive from tmp Staging Folder via process_creation
Malicious Phishing Data Exfiltration to SheetBest API by GitBait Campaign (via proxy)
Malicious PowerShell Base64 Exfiltration to save.php via EKZ Stealer
Suspicious InvisibleFerret C2 Endpoints over Port 1224 (via proxy)
Pivot detection · T1041 · 9 related

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