What is this?

Everytime I connect on the comment bar on bitcomet torrent share's other's sharing the AVG webshield always pop and says:

Accessed file is infected

Threat Detected!

File Name: post.bitcomet.com/favicon.ico

Threat Name: Trojan horse Downloader.Generic_cAC0

Process Name: C:PROGRA~1\MOZILL~\FIREFOX.EXE

Process ID: 2432

Does anyone knows what is this? Is it real? Is it dangerous?

It's real, your computer is infected with a trojan... better get that removed quickly before it steals your creditcard or starts mailing everyone you know with stupid spam. Try just deleting the file. (with SHIFT-DELETE else it stays in your trashcan)

ow, let me c again, its a web file ... maybe you're safe. But I use AVG as well and I don't get this (I also use firefox and bitcomet)