I am using Linux , i am IT so i am pretty sure that the computer is not compromised
The only thing i see possible i did mistake when i started use bitcoin i used same password as bitcointalk
there is no other possible way the password is 8 char long with Upper and lowercase
i can only blame myself that i was not using 2FA but lesson learned i post this that maybe it can help or will help someone in futur
You work in IT and set your password as "bitcointalk" ?