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How do I decrypt user passwords that are encrypted and used in Windows 7 Sysprep unattend.xml file?

What Encryption method is used in this file?

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up vote 1 down vote accepted

It is a base64-encoded string. The way to make the original password visible is to unencode (decode) it. You can do this with a PowerShell script like this:

$encryptedpassword = "SQBKAHMALgBiAGwAbwBlAG0AMwBQAGEAcwBzAHcAbwByAGQA"
Write-Host [system.text.encoding]::Unicode.GetString([system.convert]::Frombase64string($encryptedpassword))

or use online base64 decoder like this:

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