Potential Manage-bde.wsf Abuse To Proxy Execution — Sigma Rule

Rule metadata and linked tags

Author: oscd.community, Natalia Shornikova, Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: high. Source dates: 2020-10-13 / 2023-02-03.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: a664bfde3703792f4cbb4654cb7e4dc3cb3d5f21ee48e5d5e39be6a1af8cbe76

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: Potential Manage-bde.wsf Abuse To Proxy Execution
id: c363385c-f75d-4753-a108-c1a8e28bdbda
status: test
description: Detects potential abuse of the "manage-bde.wsf" script as a LOLBIN to proxy execution
references:
    - https://lolbas-project.github.io/lolbas/Scripts/Manage-bde/
    - https://gist.github.com/bohops/735edb7494fe1bd1010d67823842b712
    - https://twitter.com/bohops/status/980659399495741441
    - https://twitter.com/JohnLaTwC/status/1223292479270600706
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1216/T1216.md
author: oscd.community, Natalia Shornikova, Nasreddine Bencherchali (Nextron Systems)
date: 2020-10-13
modified: 2023-02-03
tags:
    - attack.stealth
    - attack.t1216
logsource:
    category: process_creation
    product: windows
detection:
    selection_wscript_img:
        - Image|endswith: '\wscript.exe'
        - OriginalFileName: 'wscript.exe'
    selection_wscript_cli:
        CommandLine|contains: 'manage-bde.wsf'
    selection_parent:
        ParentImage|endswith:
            - '\cscript.exe'
            - '\wscript.exe'
        ParentCommandLine|contains: 'manage-bde.wsf'
    selection_filter_cmd:
        Image|endswith: '\cmd.exe'
    condition: all of selection_wscript_* or (selection_parent and not selection_filter_cmd)
falsepositives:
    - Unlikely
level: high

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• https://lolbas-project.github.io/lolbas/Scripts/Manage-bde/
• https://gist.github.com/bohops/735edb7494fe1bd1010d67823842b712
• https://twitter.com/bohops/status/980659399495741441
• https://twitter.com/JohnLaTwC/status/1223292479270600706
• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1216/T1216.md