it is best to avoid windows 10 right now, but i don't think this is the case, of the first hacking attempt from microsoft, so it most likely that you were infected
you visited a shady website or probably downloaded something malicious, in other words it's your fault
What about the passwords?
I've never entered them on Windows 10
rootkit maybe? your system was already infected long time ago, and the hacker waited for a big amount? it is certainly possible