Potential Remote Desktop Tunneling — Sigma Rule

Rule metadata and linked tags

Author: Tim Rauch, Elastic (idea). Source status: test; severity: medium. Source dates: 2022-09-27 / not supplied.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 6678da3459cfe3c2b533182639abf43df4ee33d1f3d4c23a01e61362c0378460

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Potential Remote Desktop Tunneling
id: 8a3038e8-9c9d-46f8-b184-66234a160f6f
status: test
description: Detects potential use of an SSH utility to establish RDP over a reverse SSH Tunnel. This can be used by attackers to enable routing of network packets that would otherwise not reach their intended destination.
references:
    - https://www.elastic.co/guide/en/security/current/potential-remote-desktop-tunneling-detected.html
author: Tim Rauch, Elastic (idea)
date: 2022-09-27
tags:
    - attack.lateral-movement
    - attack.t1021
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains: ':3389' # RDP port and usual SSH tunneling related switches in command line
    selection_opt:
        CommandLine|contains:
            - ' -L '
            - ' -P '
            - ' -R '
            - ' -pw '
            - ' -ssh '
    condition: all of selection*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.elastic.co/guide/en/security/current/potential-remote-desktop-tunneling-detected.html