Deletion of Volume Shadow Copies via WMI with PowerShell

Severity: high
Author: Tim Rauch, Elastic (idea)
Source: upstream

Detects deletion of Windows Volume Shadow Copies with PowerShell code and Get-WMIObject. This technique is used by numerous ransomware families such as Sodinokibi/REvil

MITRE ATT&CK coverage

Tactic	Techniques
Impact	`T1490` Inhibit System Recovery

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation
Security-Auditing	4688	A new process has been created.

Stages and Predicates

Stage 1: `all of selection_get`

or:
CommandLine|contains: Get-CimInstance
CommandLine|contains: Get-WmiObject
CommandLine|contains: gcim
CommandLine|contains: gwmi

Stage 2: `all of selection_shadowcopy`

CommandLine|contains: Win32_ShadowCopy

Stage 3: `all of selection_delete`

or:
CommandLine|contains: '.Delete()'
CommandLine|contains: Remove-CimInstance
CommandLine|contains: Remove-WmiObject
CommandLine|contains: rcim
CommandLine|contains: rwmi

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`CommandLine`	match	`.Delete()` `Get-CimInstance` `Get-WmiObject` `Remove-CimInstance` `Remove-WmiObject` `Win32_ShadowCopy` `gcim` `gwmi` `rcim` `rwmi`