Active Directory Structure Export Via Csvde.EXE — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: medium. Source dates: 2023-03-14 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: b88c9156210cc05dcdd0d066420552eaa0e0bf85735cc20f1413fa1b17a7c55d

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: Active Directory Structure Export Via Csvde.EXE
id: e5d36acd-acb4-4c6f-a13f-9eb203d50099
status: test
description: Detects the execution of "csvde.exe" in order to export organizational Active Directory structure.
references:
    - https://www.cybereason.com/blog/research/operation-ghostshell-novel-rat-targets-global-aerospace-and-telecoms-firms
    - https://web.archive.org/web/20180725233601/https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf
    - https://businessinsights.bitdefender.com/deep-dive-into-a-backdoordiplomacy-attack-a-study-of-an-attackers-toolkit
    - https://redcanary.com/blog/msix-installers/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-03-14
tags:
    - attack.exfiltration
    - attack.discovery
    - attack.t1087.002
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\csvde.exe'
        - OriginalFileName: 'csvde.exe'
    selection_remote:
        CommandLine|contains: ' -f'
    filter_import:
        CommandLine|contains: ' -i'
    condition: all of selection_* and not 1 of filter_*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.cybereason.com/blog/research/operation-ghostshell-novel-rat-targets-global-aerospace-and-telecoms-firms
• https://web.archive.org/web/20180725233601/https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf
• https://businessinsights.bitdefender.com/deep-dive-into-a-backdoordiplomacy-attack-a-study-of-an-attackers-toolkit
• https://redcanary.com/blog/msix-installers/