# T1490 - Inhibit System Recovery

## Description from ATT&CK

> Adversaries may delete or remove built-in data and turn off services designed to aid in the recovery of a corrupted system to prevent recovery.(Citation: Talos Olympic Destroyer 2018)(Citation: FireEye WannaCry 2017) This may deny access to available backups and recovery options.
> 
> Operating systems may contain features that can help fix corrupted systems, such as a backup catalog, volume shadow copies, and automatic repair features. Adversaries may disable or delete system recovery features to augment the effects of [Data Destruction](https://attack.mitre.org/techniques/T1485) and [Data Encrypted for Impact](https://attack.mitre.org/techniques/T1486).(Citation: Talos Olympic Destroyer 2018)(Citation: FireEye WannaCry 2017) Furthermore, adversaries may disable recovery notifications, then corrupt backups.(Citation: disable_notif_synology_ransom)
> 
> A number of native Windows utilities have been used by adversaries to disable or delete system recovery features:
> 
> * <code>vssadmin.exe</code> can be used to delete all volume shadow copies on a system - <code>vssadmin.exe delete shadows /all /quiet</code>
> * [Windows Management Instrumentation](https://attack.mitre.org/techniques/T1047) can be used to delete volume shadow copies - <code>wmic shadowcopy delete</code>
> * <code>wbadmin.exe</code> can be used to delete the Windows Backup Catalog - <code>wbadmin.exe delete catalog -quiet</code>
> * <code>bcdedit.exe</code> can be used to disable automatic Windows recovery features by modifying boot configuration data - <code>bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no</code>
> * <code>REAgentC.exe</code> can be used to disable Windows Recovery Environment (WinRE) repair/recovery options of an infected system
> * <code>diskshadow.exe</code> can be used to delete all volume shadow copies on a system - <code>diskshadow delete shadows all</code> (Citation: Diskshadow) (Citation: Crytox Ransomware)
> 
> On network devices, adversaries may leverage [Disk Wipe](https://attack.mitre.org/techniques/T1561) to delete backup firmware images and reformat the file system, then [System Shutdown/Reboot](https://attack.mitre.org/techniques/T1529) to reload the device. Together this activity may leave network devices completely inoperable and inhibit recovery operations.
> 
> On ESXi servers, adversaries may delete or encrypt snapshots of virtual machines to support [Data Encrypted for Impact](https://attack.mitre.org/techniques/T1486), preventing them from being leveraged as backups (e.g., via ` vim-cmd vmsvc/snapshot.removeall`).(Citation: Cybereason)
> 
> Adversaries may also delete “online” backups that are connected to their network – whether via network storage media or through folders that sync to cloud services.(Citation: ZDNet Ransomware Backups 2020) In cloud environments, adversaries may disable versioning and backup policies and delete snapshots, database backups, machine images, and prior versions of objects designed to be used in disaster recovery scenarios.(Citation: Dark Reading Code Spaces Cyber Attack)(Citation: Rhino Security Labs AWS S3 Ransomware)

[Source](https://attack.mitre.org/techniques/T1490)

## Atomic Tests

- [Atomic Test #1: Windows - Delete Volume Shadow Copies](#atomic-test-1-windows---delete-volume-shadow-copies)
- [Atomic Test #2: Windows - Delete Volume Shadow Copies via WMI](#atomic-test-2-windows---delete-volume-shadow-copies-via-wmi)
- [Atomic Test #3: Windows - wbadmin Delete Windows Backup Catalog](#atomic-test-3-windows---wbadmin-delete-windows-backup-catalog)
- [Atomic Test #4: Windows - Disable Windows Recovery Console Repair](#atomic-test-4-windows---disable-windows-recovery-console-repair)
- [Atomic Test #5: Windows - Delete Volume Shadow Copies via WMI with PowerShell](#atomic-test-5-windows---delete-volume-shadow-copies-via-wmi-with-powershell)
- [Atomic Test #6: Windows - Delete Backup Files](#atomic-test-6-windows---delete-backup-files)
- [Atomic Test #7: Windows - wbadmin Delete systemstatebackup](#atomic-test-7-windows---wbadmin-delete-systemstatebackup)
- [Atomic Test #8: Windows - Disable the SR scheduled task](#atomic-test-8-windows---disable-the-sr-scheduled-task)
- [Atomic Test #9: Disable System Restore Through Registry](#atomic-test-9-disable-system-restore-through-registry)
- [Atomic Test #10: Windows - vssadmin Resize Shadowstorage Volume](#atomic-test-10-windows---vssadmin-resize-shadowstorage-volume)
- [Atomic Test #11: Modify VSS Service Permissions](#atomic-test-11-modify-vss-service-permissions)
- [Atomic Test #12: Disable Time Machine](#atomic-test-12-disable-time-machine)
- [Atomic Test #13: Windows - Delete Volume Shadow Copies via Diskshadow](#atomic-test-13-windows---delete-volume-shadow-copies-via-diskshadow)

### Atomic Test #1: Windows - Delete Volume Shadow Copies

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

**auto_generated_guid:** `43819286-91a9-4369-90ed-d31fb4da2c01`

#### Attack Commands: Run with `command_prompt`! Elevation Required (e.g. root or admin)

```cmd
vssadmin.exe delete shadows /all /quiet
```


#### Dependencies: Run with `powershell`!

##### Description: Create volume shadow copy of C:\ . This prereq command only works on Windows Server or Windows 8.

###### Check Prereq Commands

```powershell
if(!(vssadmin.exe list shadows | findstr "No items found that satisfy the query.")) { exit 0 } else { exit 1 }
```

###### Get Prereq Commands

```powershell
vssadmin.exe create shadow /for=c:
```

### Atomic Test #2: Windows - Delete Volume Shadow Copies via WMI

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

**auto_generated_guid:** `6a3ff8dd-f49c-4272-a658-11c2fe58bd88`

#### Attack Commands: Run with `command_prompt`! Elevation Required (e.g. root or admin)

```cmd
wmic.exe shadowcopy delete
```


#### Dependencies: Run with `powershell`!

##### Description: Create volume shadow copy of C:\ .

###### Check Prereq Commands

```powershell
if(!(vssadmin.exe list shadows | findstr "No items found that satisfy the query.")) { exit 0 } else { exit 1 }
```

###### Get Prereq Commands

```powershell
wmic shadowcopy call create Volume='C:\'
```

###