Periodic Backup For System Registry Hives Enabled

calendar Aug 12, 2024 · attack.collection attack.t1113  ·
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Detects the enabling of the "EnablePeriodicBackup" registry value. Once enabled, The OS will backup System registry hives on restarts to the "C:\Windows\System32\config\RegBack" folder. Windows creates a "RegIdleBackup" task to manage subsequent backups. Registry backup was a default behavior on Windows and was disabled as of "Windows 10, version 1803".

Sigma rule (View on GitHub)

 1title: Periodic Backup For System Registry Hives Enabled
 2id: 973ef012-8f1a-4c40-93b4-7e659a5cd17f
 3status: experimental
 4description: |
 5    Detects the enabling of the "EnablePeriodicBackup" registry value. Once enabled, The OS will backup System registry hives on restarts to the "C:\Windows\System32\config\RegBack" folder. Windows creates a "RegIdleBackup" task to manage subsequent backups.
 6    Registry backup was a default behavior on Windows and was disabled as of "Windows 10, version 1803".    
 7references:
 8    - https://learn.microsoft.com/en-us/troubleshoot/windows-client/installing-updates-features-roles/system-registry-no-backed-up-regback-folder
 9author: Nasreddine Bencherchali (Nextron Systems)
10date: 2024-07-01
11tags:
12    - attack.collection
13    - attack.t1113
14logsource:
15    category: registry_set
16    product: windows
17detection:
18    selection:
19        TargetObject|endswith: '\Control\Session Manager\Configuration Manager\EnablePeriodicBackup'
20        Details: 'DWORD (0x00000001)'
21    condition: selection
22falsepositives:
23    - Legitimate need for RegBack feature by administrators.
24level: medium

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