P2p Trojan or virus

I was reading on a Symantec page about the dangers of p2p. I know it's dangerous but I read on that page and on a few others from ftc.gov that there was a malware or virus that once downloaded on p2p it would change share directories to your hardrive. All users then could download your hardrive as that's what's avail for sharing. This article was dated in 2003?! So I'm assuming that virus was beaten shortly after created? Any help