sigmaDRL-1.1from SigmaHQ/sigma
Periodic Backup For System Registry Hives Enabled
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".
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ATT&CK techniques
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