What is Trojan:Win64/Sirefef.U?
Trojan:Win64/Sirefef.U is a Trojan infection from a multi-component Trojan family called Win64/Sirefef. Trojan:Win64/Sirefef.U is responsible for modifying Internet browser settings. It displays false search results and forcefully redirects the user to pay-per-click advertising websites that generate revenue to cyber criminals. Every single member of the Sirefef family performs a different function allowing other elements of the infection to function properly.
It is hard to know when or how your computer gets infected with Trojan:Win64/Sirefef.U, because there are no definite infection symptoms. Usually this Trojan installed by other components of the Sirefef family. The moment Trojan:Win64/Sirefef.U is installed onto the target computer, once it runs it installs yet another malicious component detected as Win64/Sirefef.Y.
Trojan:Win64/Sirefef.U was first detected in March 2012. It is composed of multiple .exe and .dll files that have random names. They can change with every new infection, but it is common to find these files in computer infected with Trojan:Win64/Sirefef.U: 8cac82a0-5016.exe, 0074b1b4.exe, s716mdm.dll, irenum.dll, ino_flpy.dll and so on. Take note that the .exe files are ought to be found on Windows Task Manager's Processes list.
Having any infection from Sirefef family on your computer is very risky, because these Trojans are closely associated with WinWebSec family of rogue antispyware. Thus, if you are infected with Trojan:Win64/S, it is very likely that sooner (rather than later), you will be get infected with Live Security Platinum or System Progressive Protection as well. These rogues are exceptionally dangerous, so you have to safeguard your system against them no matter what.
Remove Trojan:Win64/Sirefef.U from your computer with a powerful security tool. Computer security program of choice will also allow you to check for other possible infections. Keep your computer clean, and avoid being infected with such threats as Trojan:Win64/Sirefef.U.
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