Trojans are divided into a number different categories based on their function or type of damage.Be Aware of the Following Trojan Threats:Skyfire.Spy, Bancos.HQT, Benny, TrojanDownloader.Win32.Miled, Keylog.Remote.DoSA DoS (Denial of Service) attack is designed to disrupt or stop the normal running of a Web site, server, or other network resource.