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

OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/Ransomware/ShadowCopyDeletion.yaml
requiredDataConnectors:
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - DeviceProcessEvents
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), "")  
id: 28c63a44-2d35-48b7-831b-3ed24af17c7e
severity: Medium
queryFrequency: 1h
relevantTechniques:
- T1490
tactics:
- Impact
triggerThreshold: 0
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/  
status: Available
name: Shadow Copy Deletions
version: 1.0.0
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: DeviceName
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: DnsDomain
  entityType: Host
- fieldMappings:
  - identifier: FullName
    columnName: AccountUpn
  - identifier: Name
    columnName: AccountName
  - identifier: DnsDomain
    columnName: AccountDomain
  entityType: Account
- fieldMappings:
  - identifier: ProcessId
    columnName: ProcessId
  - identifier: CommandLine
    columnName: ProcessCommandLine
  entityType: Process
kind: Scheduled
triggerOperator: gt
queryPeriod: 1h

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/28c63a44-2d35-48b7-831b-3ed24af17c7e')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/28c63a44-2d35-48b7-831b-3ed24af17c7e')]",
      "properties": {
        "alertRuleTemplateName": "28c63a44-2d35-48b7-831b-3ed24af17c7e",
        "customDetails": null,
        "description": "This rule detects when Shadow Copies are being deleted. This is a know actions that is performed by threat actors.\nThis query detects know commands that have been used by the ransomware actors.\nSome information from Mitre Attack: \nhttps://attack.mitre.org/techniques/T1490/\n",
        "displayName": "Shadow Copy Deletions",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DeviceName",
                "identifier": "FullName"
              },
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "DnsDomain",
                "identifier": "DnsDomain"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountUpn",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountDomain",
                "identifier": "DnsDomain"
              }
            ]
          },
          {
            "entityType": "Process",
            "fieldMappings": [
              {
                "columnName": "ProcessId",
                "identifier": "ProcessId"
              },
              {
                "columnName": "ProcessCommandLine",
                "identifier": "CommandLine"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/Ransomware/ShadowCopyDeletion.yaml",
        "query": "let CommonRansomwareExecutionCommands = dynamic([@'vssadmin.exe delete shadows /all /quiet', \n@'wmic.exe shadowcopy delete', @'wbadmin delete catalog -quiet', \n@'Get-WmiObject Win32_Shadowcopy | ForEach-Object {$_.Delete();}',\n@'del /s /f /q c:\\*.VHD c:\\*.bac c:\\*.bak c:\\*.wbcat c:\\*.bkf c:\\Backup*.* c:\\backup*.* c:\\*.set c:\\*.win c:\\*.dsk', \n@'wbadmin delete systemstatebackup -keepVersions:0', \n@'schtasks.exe /Change /TN \"\\Microsoft\\Windows\\SystemRestore\\SR\" /disable', \n@'schtasks.exe /Change /TN \"\\Microsoft\\Windows\\SystemRestore\\SR\" /enable >nul 2>&1', \n@'reg add \"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows NT\\SystemRestore\" /v \"DisableConfig\" /t \"REG_DWORD\" /d \"1\" /f', \n@'reg add \"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows NT\\SystemRestore\" /v \"DisableSR\" /t \"REG_DWORD\" /d \"1\" /f', \n@'reg add \"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\SystemRestore\" /v \"DisableConfig\" /t \"REG_DWORD\" /d \"1\" /f', \n@'reg add \"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\SystemRestore\" /v \"DisableSR\" /t \"REG_DWORD\" /d \"1\" /f', \n@'reg delete \"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows NT\\SystemRestore\" /v \"DisableConfig\" /f >nul 2>&1', \n@'reg delete \"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows NT\\SystemRestore\" /v \"DisableSR\" /f >nul 2>&1', \n@'reg delete \"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\SystemRestore\" /v \"DisableConfig\" /f >nul 2>&1', \n@'reg delete \"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\SystemRestore\" /v \"DisableSR\" /f >nul 2>&1']);\nDeviceProcessEvents\n| where ProcessCommandLine has_any (CommonRansomwareExecutionCommands)\n| project-reorder TimeGenerated, ProcessCommandLine, DeviceName, AccountName\n| extend HostName = iff(DeviceName has '.', substring(DeviceName, 0, indexof(DeviceName, '.')), DeviceName)\n| extend DnsDomain = iff(DeviceName has '.', substring(DeviceName, indexof(DeviceName, '.') + 1), \"\")\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1490"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}