File Creation In Suspicious Directory By Msdt.EXE — Sigma Rule

Rule metadata and linked tags

Author: Vadim Varganov, Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2022-08-24 / 2023-02-23.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: b593ddd00c3c3314c1b3603ddd40183175b373ff6f6170408dd99c85886ba3b7

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: File Creation In Suspicious Directory By Msdt.EXE
id: 318557a5-150c-4c8d-b70e-a9910e199857
status: test
description: Detects msdt.exe creating files in suspicious directories which could be a sign of exploitation of either Follina or Dogwalk vulnerabilities
references:
    - https://irsl.medium.com/the-trouble-with-microsofts-troubleshooters-6e32fc80b8bd
    - https://msrc-blog.microsoft.com/2022/05/30/guidance-for-cve-2022-30190-microsoft-support-diagnostic-tool-vulnerability/
author: Vadim Varganov, Florian Roth (Nextron Systems)
date: 2022-08-24
modified: 2023-02-23
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1547.001
    - cve.2022-30190
logsource:
    category: file_event
    product: windows
detection:
    selection:
        Image|endswith: '\msdt.exe'
        TargetFilename|contains:
            - '\Desktop\'
            - '\Start Menu\Programs\Startup\'
            - 'C:\PerfLogs\'
            - 'C:\ProgramData\'
            - 'C:\Users\Public\'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://irsl.medium.com/the-trouble-with-microsofts-troubleshooters-6e32fc80b8bd
• https://msrc-blog.microsoft.com/2022/05/30/guidance-for-cve-2022-30190-microsoft-support-diagnostic-tool-vulnerability/