Potential MSTSC Shadowing Activity

Status: test
Severity: high
Log source: category process_creation, product windows
Author: Florian Roth (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects RDP session hijacking by using MSTSC shadowing

MITRE ATT&CK coverage

Tactic	Techniques
Lateral Movement	`T1563.002` Remote Service Session Hijacking: RDP Hijacking

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 1: Process creation
Security-Auditing	Event ID 4688: A new process has been created.

Rule body

title: Potential MSTSC Shadowing Activity
id: 6ba5a05f-b095-4f0a-8654-b825f4f16334
status: test
description: Detects RDP session hijacking by using MSTSC shadowing
references:
    - https://twitter.com/kmkz_security/status/1220694202301976576
    - https://github.com/kmkz/Pentesting/blob/47592e5e160d3b86c2024f09ef04ceb87d204995/Post-Exploitation-Cheat-Sheet
author: Florian Roth (Nextron Systems)
date: 2020-01-24
modified: 2023-02-05
tags:
    - attack.lateral-movement
    - attack.t1563.002
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - 'noconsentprompt'
            - 'shadow:'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    CommandLine|contains|all:
        - 'noconsentprompt'
        - 'shadow:'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`noconsentprompt` `shadow:`	`field:"CommandLine" kind:match`

Potential MSTSC Shadowing Activity

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`