China hacked dozens of email accounts, including in government. Microsoft opens up, slightly, about how the hackers pulled off the heist.

Microsoft says Storm-0558 Chinese hackers stole a signing key used to breach government email accounts from a Windows crash dump after compromising a Microsoft engineer's corporate account.

Russian state-backed hackers gained access to some of Microsoft’s core software systems in a hack first disclosed in January, the company said Friday, revealing a more extensive and serious ...