Execute Pcwrun.EXE To Leverage Follina — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: high. Source dates: 2022-06-13 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 9387b8dc338ac0e94a534447a1f6ec82acea228d92c8ab4a455097cc3bb380fd

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: Execute Pcwrun.EXE To Leverage Follina
id: 6004abd0-afa4-4557-ba90-49d172e0a299
status: test
description: Detects indirect command execution via Program Compatibility Assistant "pcwrun.exe" leveraging the follina (CVE-2022-30190) vulnerability
references:
    - https://twitter.com/nas_bench/status/1535663791362519040
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-13
tags:
    - attack.stealth
    - attack.t1218
    - attack.execution
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\pcwrun.exe'
        CommandLine|contains: '../'
    condition: selection
falsepositives:
    - Unlikely
level: high

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• https://twitter.com/nas_bench/status/1535663791362519040