Periodic Backup For System Registry Hives Enabled

 Original Source: [Sigma source]
Title: Periodic Backup For System Registry Hives Enabled
Status: test
Description: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".
References:
  -https://learn.microsoft.com/en-us/troubleshoot/windows-client/installing-updates-features-roles/system-registry-no-backed-up-regback-folder
Author: Nasreddine Bencherchali (Nextron Systems)
Date: 2024-07-01
modified:None
Tags:
  • -'attack.collection'
  • -'attack.t1113'
Logsource:
  • category: registry_set
  • product: windows
Detection:
  selection:
    TargetObject|endswith: '\Control\Session Manager\Configuration Manager\EnablePeriodicBackup'
    Details: 'DWORD (0x00000001)'
  condition:selection
Falsepositives:
  -Legitimate need for RegBack feature by administrators.
Level: medium