Suspicious RDP Redirect Using TSCON — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2018-03-17 / 2023-05-16.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 233cf729118e7af79352a6c8fe4e0467f19553ae41ed765498e0820f197747f4

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: Suspicious RDP Redirect Using TSCON
id: f72aa3e8-49f9-4c7d-bd74-f8ab84ff9bbb
status: test
description: Detects a suspicious RDP session redirect using tscon.exe
references:
    - http://www.korznikov.com/2017/03/0-day-or-feature-privilege-escalation.html
    - https://medium.com/@networksecurity/rdp-hijacking-how-to-hijack-rds-and-remoteapp-sessions-transparently-to-move-through-an-da2a1e73a5f6
    - https://www.hackingarticles.in/rdp-session-hijacking-with-tscon/
author: Florian Roth (Nextron Systems)
date: 2018-03-17
modified: 2023-05-16
tags:
    - attack.lateral-movement
    - attack.t1563.002
    - attack.t1021.001
    - car.2013-07-002
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains: ' /dest:rdp-tcp#'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• http://www.korznikov.com/2017/03/0-day-or-feature-privilege-escalation.html
• https://medium.com/@networksecurity/rdp-hijacking-how-to-hijack-rds-and-remoteapp-sessions-transparently-to-move-through-an-da2a1e73a5f6
• https://www.hackingarticles.in/rdp-session-hijacking-with-tscon/