Some of the projects target only discord but others are like you siad. They steal browser login/payment/cookies crypto wallet, password manager dbs and a whole lot more. They then sell this info to whoever wants to pay for it on criminal chats and forums.

These are open source but the popular ones are paid malware (as cheap as a few dollars though) you get on those same forums/chats that have more features, evasiveness and nice control panels. But arguably, discord is a nice enough control panel lol.