Detectionhightest

Ngrok Usage with Remote Desktop Service

Detects cases in which ngrok, a reverse proxy tool, forwards events to the local RDP port, which could be a sign of malicious behaviour

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Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Florian Roth (Nextron Systems)Created Fri Apr 2964d51a51-32a6-49f0-9f3d-17e34d640272windows

Log Source

Windowsterminalservices-localsessionmanager

ProductWindows← raw: windows

Serviceterminalservices-localsessionmanager← raw: terminalservices-localsessionmanager

Detection Logic

detection:
    selection:
        EventID: 21
        Address|contains: '16777216'
    condition: selection

False Positives

Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References

MITRE ATT&CK

Tactics

Techniques

Rule Metadata

Rule ID

64d51a51-32a6-49f0-9f3d-17e34d640272

Status

test

Level

high

Type

Detection

Created

Fri Apr 29

Author

Path

rules/windows/builtin/terminalservices/win_terminalservices_rdp_ngrok.yml

Raw Tags

attack.command-and-controlattack.t1090