Malicious RDP Tunneling via ngrok (via process_creation)

PremiumReviewedSigma · High · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-10-07
Updated
2026-10-07

ATT&CK techniques

Lateral Movement → 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. Collection

  11. Exfiltration

  12. Impact

What it detects

This rule detects ngrok being used to forward TCP port 3389 which attackers abusing trusted relationships employ to tunnel Remote Desktop through the perimeter and access internal hosts from the internet.

Related detections9 linkedT1572 — drag to rearrange
Suspicious SSH Reverse Tunnel Execution via process_creation
Obfuscated RDP Tunneling Configuration Enabled for Port Forwarding (via process_creation)
Malicious RDP Tunneling (via rdp)
Possible Ngrok RDP Tunnel Exposure via TCP 3389
Port Forwarding via SSH.EXE on Windows
Windows svchost.exe RDP (3389) Connections to HTTP/HTTPS Ports 80 or 443
Windows Plink Remote Port Forwarding via -R Command Line
Windows svchost RDP via Reverse SSH Loopback Tunnel to 127.0.0.0/8:3389
Suspicious UUID Named Pipe Created Consistent with Mythic SMB Agent
Malicious RDP Tunneling via ngrok (via process_creation)
Pivot detection · T1572 · 9 related

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