That's true malware attacks were encountered often with the darknet services. To overcome such issues in the darknet community is simply risky as well highly tedious. Once before entering into it making needful arrangements make things to work in a better way than getting hacked or trapped.
And also there is a ransomware that detain your pc tobe usable. If you don't want your personal files to be spread in the cyberworld you must pay this blah blah blah.......
Darknet people there are so wise i got a friend that wants to have a deal with a darknet person. The deal is 5 stolen btc to be sold for 1btc. He grab the opportunity of buying. They have a middleman called i dont remember that exact pseudonym but that is a well known middleman on the darknet marketplace. also the seller of the 5 stolen btc is a trusted person. When they are doing their transactions the middleman said that he got the seller's 5 btc and suddenly my friend send the 1btc to the seller when my friend's btc are sent. The two of them just vanished. And my friend got scammed. lol. I don't know what market he enters, he just only told me his experience on darkent marketplace. So my advice is be cautious and responsible on your actions.