Shadow Copies Creation Using Operating Systems Utilities — Sigma Rule

Rule metadata and linked tags

Author: Teymur Kheirkhabarov, Daniil Yugoslavskiy, oscd.community. Source status: test; severity: medium. Source dates: 2019-10-22 / 2022-11-10.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: a36815367b97fd09740862ea4ca6d6ee2930a99eb5d03d72aa1ee5ab8d3465aa

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: Shadow Copies Creation Using Operating Systems Utilities
id: b17ea6f7-6e90-447e-a799-e6c0a493d6ce
status: test
description: Shadow Copies creation using operating systems utilities, possible credential access
references:
    - https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment
    - https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/tutorial-for-ntds-goodness-vssadmin-wmis-ntdsdit-system/
author: Teymur Kheirkhabarov, Daniil Yugoslavskiy, oscd.community
date: 2019-10-22
modified: 2022-11-10
tags:
    - attack.credential-access
    - attack.t1003
    - attack.t1003.002
    - attack.t1003.003
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith:
              - '\powershell.exe'
              - '\pwsh.exe'
              - '\wmic.exe'
              - '\vssadmin.exe'
        - OriginalFileName:
              - 'PowerShell.EXE'
              - 'pwsh.dll'
              - 'wmic.exe'
              - 'VSSADMIN.EXE'
    selection_cli:
        CommandLine|contains|all:
            - 'shadow'
            - 'create'
    condition: all of selection_*
falsepositives:
    - Legitimate administrator working with shadow copies, access for backup purposes
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate administrator working with shadow copies, access for backup purposes

Source references

• https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment
• https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/tutorial-for-ntds-goodness-vssadmin-wmis-ntdsdit-system/