DMSetUp

DMSetUp is a Trojan/worm that spreads itself by infecting anyone joining your m-Internet Relay Chat (mIRC) channel. Then, DMSetUp copies itself into several directories on your hard drive, and hides under several file names while changing your original files. Symptoms of DMSetUp may include your pop-up windows and scripts changing, you unintentionally dcc'ing files to people, and your username has changing to "s."