Detection rules › Sigma
VSS backup deletion (WMI)
Detects scenarios where an attacker attempts to delete existing VSS backup.
Known false positives
- administrator cleaning outdated backup
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Impact |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: VSS backup deletion (WMI)
description: Detects scenarios where an attacker attempts to delete existing VSS backup.
references:
- https://github.com/mdecrevoisier/EVTX-to-MITRE-Attack/tree/master/TA0040-Impact/T1490-Inhibit%20System%20Recovery
- https://www.picussecurity.com/resource/blog/how-to-beat-nefilim-ransomware-attacks
- https://www.itechtics.com/volume-shadow-copies/
- https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/wbadmin
- https://www.picussecurity.com/resource/blog/technique-to-delete-volume-shadow-copies-deviceiocontrol
- https://lolbas-project.github.io/lolbas/Binaries/Wmic/
- https://www.mandiant.com/resources/chasing-avaddon-ransomware
- https://blogs.vmware.com/security/2022/09/threat-report-illuminating-volume-shadow-deletion.html
tags:
- attack.impact
- attack.t1490
author: mdecrevoisier
status: experimental
logsource:
product: windows
category: process_creation
detection:
selection: # wmic shadowcopy delete /nointeractive
NewProcessName|endswith: \wmic.exe
CommandLine|contains|all:
- shadowcopy
- delete
condition: selection
falsepositives:
- administrator cleaning outdated backup
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
NewProcessName|endswith: \wmic.exe
CommandLine|contains|all:
- shadowcopy
- delete
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |
NewProcessName | ends_with |
| field:"Image" kind:ends_with value:"\wmic.exe" |