I think it is still very difficult to do for now, but for the next few years it may happen that more and more people are interested in btc or cryptocurrency, the more people try to make a profit by shortcut, so if malware can stealing cryptocurrency or btc will be very difficult, but if you steal our data it is very possible especially if you put your privacy key and password on the computer that has been exposed to the malware it will be very easy for them to hack