Hijack Legit RDP Session to Move Laterally — Sigma Rule

Rule metadata and linked tags

Author: Samir Bousseaden. Source status: test; severity: high. Source dates: 2019-02-21 / 2021-11-27.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 35628d176c49c6ff2584b6094c7d5725e133a3a051c8483806316dcd32167f00

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: Hijack Legit RDP Session to Move Laterally
id: 52753ea4-b3a0-4365-910d-36cff487b789
status: test
description: Detects the usage of tsclient share to place a backdoor on the RDP source machine's startup folder
author: Samir Bousseaden
references:
    - Internal Research
date: 2019-02-21
modified: 2021-11-27
tags:
    - attack.command-and-control
    - attack.t1219.002
logsource:
    product: windows
    category: file_event
detection:
    selection:
        Image|endswith: '\mstsc.exe'
        TargetFilename|contains: '\Microsoft\Windows\Start Menu\Programs\Startup\'
    condition: selection
falsepositives:
    - Unlikely
level: high

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• Internal Research (source note; no public URL supplied)