Clipboard malware already come from years ago, and who get usually attacked is people who not really concern about recipient address when they want to send their crypto. AT first maybe sorry for your loss, but it is better to clean your computer for now and in next time make sure to see address that we want to send the coins, in past after that things attack a lot of people, before i send my coins, usually i see multiple times first 5 digit and last 5 digit address that i want to copy and paste.