Worm.Win32.Netbooster is a fake warning message alerts which is comes from trojan zlob and promotes the rogue anti-spyware program. Trojan.Zlob is a back door Trojan that allows the remote attacker to perform various malicious actions on the compromised computer. If you are getting “Worm.Win32.Netbooster” alerts, it means you are infected by Trojan.Zlob. (via)