RDP Over Reverse SSH Tunnel — Sigma Rule

Rule metadata and linked tags

Author: Samir Bousseaden. Source status: test; severity: high. Source dates: 2019-02-16 / 2024-03-12.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: ba1f6039ec34a2c422cdde5bf52d42ce3e8ac434ab8bf6ce2eae22f2e95040ec

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: RDP Over Reverse SSH Tunnel
id: 5f699bc5-5446-4a4a-a0b7-5ef2885a3eb4
status: test
description: Detects svchost hosting RDP termsvcs communicating with the loopback address and on TCP port 3389
references:
    - https://twitter.com/cyb3rops/status/1096842275437625346
author: Samir Bousseaden
date: 2019-02-16
modified: 2024-03-12
tags:
    - attack.command-and-control
    - attack.t1572
    - attack.lateral-movement
    - attack.t1021.001
    - car.2013-07-002
logsource:
    category: network_connection
    product: windows
detection:
    selection_img:
        Image|endswith: '\svchost.exe'
        Initiated: 'true'
        SourcePort: 3389
    selection_destination:
        DestinationIp|cidr:
            - '127.0.0.0/8'
            - '::1/128'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://twitter.com/cyb3rops/status/1096842275437625346