New BgInfo.EXE Custom VBScript Registry Configuration — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: medium. Source dates: 2023-08-16 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 9d90dae4a2f31d12570269d40fc7d46ad35ede7a8e3e09ee4d5cc49849e667c2

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: New BgInfo.EXE Custom VBScript Registry Configuration
id: 992dd79f-dde8-4bb0-9085-6350ba97cfb3
related:
    - id: cd277474-5c52-4423-a52b-ac2d7969902f
      type: similar
status: test
description: Detects setting of a new registry value related to BgInfo configuration, which can be abused to execute custom VBScript via "BgInfo.exe"
references:
    - Internal Research
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-08-16
tags:
    - attack.persistence
    - attack.defense-impairment
    - attack.t1112
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|contains: '\Software\Winternals\BGInfo\UserFields\'
        Details|startswith: '4' # WMI
    condition: selection
falsepositives:
    - Legitimate VBScript
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate VBScript

Source references

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