Use of OpenConsole — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: medium. Source dates: 2022-06-16 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 0233a9aeef71adcc18a73e9e3749b6a9b2e7f21cda489cd78da856c41d5ef877

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: Use of OpenConsole
id: 814c95cc-8192-4378-a70a-f1aafd877af1
status: test
description: Detects usage of OpenConsole binary as a LOLBIN to launch other binaries to bypass application Whitelisting
references:
    - https://twitter.com/nas_bench/status/1537563834478645252
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-16
tags:
    - attack.execution
    - attack.t1059
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - OriginalFileName: 'OpenConsole.exe'
        - Image|endswith: '\OpenConsole.exe'
    filter:
        Image|startswith: 'C:\Program Files\WindowsApps\Microsoft.WindowsTerminal' # We exclude the default path for WindowsTerminal
    condition: selection and not filter
falsepositives:
    - Legitimate use by an administrator
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate use by an administrator

Source references

• https://twitter.com/nas_bench/status/1537563834478645252