I just wanted to bump this thread and say a similar thing happened to me. I got an email saying my account was locked (I had no idea I had an account and the username was a bizarre string of numbers and letters). I reset the password through the official site and, as with the OP, the name was set to asd dsa located in the Russian Federation.
The official email suggests the account was locked (implying they failed to get in), but the changed personal information suggests otherwise. I’ve now secured the account and am updating my passwords across other sites.
Thank you for sharing the information above and I appreciate Epic’s efforts, but it seems some serious is going on.