VolumeShadowCopy Symlink Creation Via Mklink — Sigma Rule

Rule metadata and linked tags

Author: Teymur Kheirkhabarov, oscd.community. Source status: stable; severity: high. Source dates: 2019-10-22 / 2023-03-06.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: bc4f21ce14968b794cfb74460851cb99575fa8435dbfa1baf1ea81e77e06a06e

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: VolumeShadowCopy Symlink Creation Via Mklink
id: 40b19fa6-d835-400c-b301-41f3a2baacaf
status: stable
description: Shadow Copies storage symbolic link creation using operating systems utilities
references:
    - https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment
author: Teymur Kheirkhabarov, oscd.community
date: 2019-10-22
modified: 2023-03-06
tags:
    - attack.credential-access
    - attack.t1003.002
    - attack.t1003.003
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - 'mklink'
            - 'HarddiskVolumeShadowCopy'
    condition: selection
falsepositives:
    - Legitimate administrator working with shadow copies, access for backup purposes
level: high

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