Shadow Copy Deletions

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Id	28c63a44-2d35-48b7-831b-3ed24af17c7e
Rulename	Shadow Copy Deletions
Description	This rule detects when Shadow Copies are being deleted. This is a know actions that is performed by threat actors. This query detects know commands that have been used by the ransomware actors. Some information from Mitre Attack: https://attack.mitre.org/techniques/T1490/
Severity	Medium
Tactics	Impact
Techniques	T1490
Required data connectors	MicrosoftThreatProtection
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/Ransomware/ShadowCopyDeletion.yaml
Version	1.0.0
Arm template	28c63a44-2d35-48b7-831b-3ed24af17c7e.json

KQL

let CommonRansomwareExecutionCommands = dynamic([@'vssadmin.exe delete shadows /all /quiet', 
@'wmic.exe shadowcopy delete', @'wbadmin delete catalog -quiet', 
@'Get-WmiObject Win32_Shadowcopy | ForEach-Object {$_.Delete();}',
@'del /s /f /q c:\*.VHD c:\*.bac c:\*.bak c:\*.wbcat c:\*.bkf c:\Backup*.* c:\backup*.* c:\*.set c:\*.win c:\*.dsk', 
@'wbadmin delete systemstatebackup -keepVersions:0', 
@'schtasks.exe /Change /TN "\Microsoft\Windows\SystemRestore\SR" /disable', 
@'schtasks.exe /Change /TN "\Microsoft\Windows\SystemRestore\SR" /enable >nul 2>&1', 
@'reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore" /v "DisableConfig" /t "REG_DWORD" /d "1" /f', 
@'reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore" /v "DisableSR" /t "REG_DWORD" /d "1" /f', 
@'reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "DisableConfig" /t "REG_DWORD" /d "1" /f', 
@'reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "DisableSR" /t "REG_DWORD" /d "1" /f', 
@'reg delete "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore" /v "DisableConfig" /f >nul 2>&1', 
@'reg delete "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore" /v "DisableSR" /f >nul 2>&1', 
@'reg delete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "DisableConfig" /f >nul 2>&1', 
@'reg delete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "DisableSR" /f >nul 2>&1']);
DeviceProcessEvents
| where ProcessCommandLine has_any (CommonRansomwareExecutionCommands)
| project-reorder TimeGenerated, ProcessCommandLine, DeviceName, AccountName
| extend HostName = iff(DeviceName has '.', substring(DeviceName, 0, indexof(DeviceName, '.')), DeviceName)
| extend DnsDomain = iff(DeviceName has '.', substring(DeviceName, indexof(DeviceName, '.') + 1), "")

YAML

queryPeriod: 1h
query: |
  let CommonRansomwareExecutionCommands = dynamic([@'vssadmin.exe delete shadows /all /quiet', 
  @'wmic.exe shadowcopy delete', @'wbadmin delete catalog -quiet', 
  @'Get-WmiObject Win32_Shadowcopy | ForEach-Object {$_.Delete();}',
  @'del /s /f /q c:\*.VHD c:\*.bac c:\*.bak c:\*.wbcat c:\*.bkf c:\Backup*.* c:\backup*.* c:\*.set c:\*.win c:\*.dsk', 
  @'wbadmin delete systemstatebackup -keepVersions:0', 
  @'schtasks.exe /Change /TN "\Microsoft\Windows\SystemRestore\SR" /disable', 
  @'schtasks.exe /Change /TN "\Microsoft\Windows\SystemRestore\SR" /enable >nul 2>&1', 
  @'reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore" /v "DisableConfig" /t "REG_DWORD" /d "1" /f', 
  @'reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore" /v "DisableSR" /t "REG_DWORD" /d "1" /f', 
  @'reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "DisableConfig" /t "REG_DWORD" /d "1" /f', 
  @'reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "DisableSR" /t "REG_DWORD" /d "1" /f', 
  @'reg delete "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore" /v "DisableConfig" /f >nul 2>&1', 
  @'reg delete "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore" /v "DisableSR" /f >nul 2>&1', 
  @'reg delete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "DisableConfig" /f >nul 2>&1', 
  @'reg delete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "DisableSR" /f >nul 2>&1']);
  DeviceProcessEvents
  | where ProcessCommandLine has_any (CommonRansomwareExecutionCommands)
  | project-reorder TimeGenerated, ProcessCommandLine, DeviceName, AccountName
  | extend HostName = iff(DeviceName has '.', substring(DeviceName, 0, indexof(DeviceName, '.')), DeviceName)
  | extend DnsDomain = iff(DeviceName has '.', substring(DeviceName, indexof(DeviceName, '.') + 1), "")  
name: Shadow Copy Deletions
entityMappings:
- fieldMappings:
  - columnName: DeviceName
    identifier: FullName
  - columnName: HostName
    identifier: HostName
  - columnName: DnsDomain
    identifier: DnsDomain
  entityType: Host
- fieldMappings:
  - columnName: AccountUpn
    identifier: FullName
  - columnName: AccountName
    identifier: Name
  - columnName: AccountDomain
    identifier: DnsDomain
  entityType: Account
- fieldMappings:
  - columnName: ProcessId
    identifier: ProcessId
  - columnName: ProcessCommandLine
    identifier: CommandLine
  entityType: Process
queryFrequency: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/Ransomware/ShadowCopyDeletion.yaml
requiredDataConnectors:
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - DeviceProcessEvents
description: |
  This rule detects when Shadow Copies are being deleted. This is a know actions that is performed by threat actors.
  This query detects know commands that have been used by the ransomware actors.
  Some information from Mitre Attack: 
  https://attack.mitre.org/techniques/T1490/  
kind: Scheduled
version: 1.0.0
status: Available
severity: Medium
relevantTechniques:
- T1490
triggerOperator: gt
triggerThreshold: 0
tactics:
- Impact
id: 28c63a44-2d35-48b7-831b-3ed24af17c7e

ARM