The reason I mention this is because this one kid I knew in school wrote a small program - key logger - and made a video on YouTube about how this program did something in game to make you money in game.
But the YouTube video wasn't of the program he made, it was a fake video of how this thing makes money but...the program he linked to this video was his key logger. Then when people downloaded it, it would steal account info, then he'd go in game and trade to his character.