Uncommon Child Process Of BgInfo.EXE — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems), Beyu Denis, oscd.community. Source status: test; severity: medium. Source dates: 2019-10-26 / 2023-08-16.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: be051512fe532b313a527aa34aa5a67c0838e91115235e22e3ba90ef391d5501

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: Uncommon Child Process Of BgInfo.EXE
id: aaf46cdc-934e-4284-b329-34aa701e3771
related:
    - id: 811f459f-9231-45d4-959a-0266c6311987
      type: similar
status: test
description: Detects uncommon child processes of "BgInfo.exe" which could be a sign of potential abuse of the binary to proxy execution via external VBScript
references:
    - https://lolbas-project.github.io/lolbas/OtherMSBinaries/Bginfo/
    - https://oddvar.moe/2017/05/18/bypassing-application-whitelisting-with-bginfo/
author: Nasreddine Bencherchali (Nextron Systems), Beyu Denis, oscd.community
date: 2019-10-26
modified: 2023-08-16
tags:
    - attack.execution
    - attack.stealth
    - attack.t1059.005
    - attack.t1218
    - attack.t1202
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith:
            - '\bginfo.exe'
            - '\bginfo64.exe'
    condition: selection
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://lolbas-project.github.io/lolbas/OtherMSBinaries/Bginfo/
• https://oddvar.moe/2017/05/18/bypassing-application-whitelisting-with-bginfo/