Possible Ngrok RDP Tunnel Exposure via TCP 3389
- Product
- windows
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-08-14
- Updated
- 2026-08-28
ATT&CK techniques
Lateral Movement → C2Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
Exfiltration
Impact
What it detects
This rule detects command lines that tunnel TCP port 3389 which exposes internal Remote Desktop Protocol to the internet. The BlackJack group used ngrok tcp 3389 to reach RDP on compromised hosts, and such tunneling enables covert lateral movement and remote interactive access.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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Also included
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