Also hacker can use Keylogger Trojan which easily can log every key log that you pressed on keyboard. After collecting enough data there are various tools for getting required data included login,passwords,coin seed and more vulnerable personal information.
That would be dangerous to get your data. About keylogger trojan, is it some sort of like a keylogger app but as a virus that will send the data collected from your computer?.
I guess it can be a virus, because keylogger is a computer program that can record every stroke by the user of the computer and aside from that this app can access your password and other personal information.