Trojan:WinNT/Sirefef.J

Trojan:WinNT/Sirefef.J is a Trojan with rootkit capabilities that blocks attacked PC users from normal web browsing by modifying search results in any genuine search engine and using the pay-per-click technique to make money. Trojan:WinNT/Sirefef.J downloads updates and additional components and conceals existing components on the corrupted PC. Trojan:WinNT/Sirefef.J uses advanced stealthy techniques in an effort to bypass the detection and extermination from the affected computer. Trojan:WinNT/Sirefef.J uses particular ports for its peer-to-peer communications.