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Danger level 8
Type: Trojans
Common infection symptoms:
  • Connects to the internet without permission
  • Installs itself without permissions
  • Shows commercial adverts
  • Slow Computer
  • Slow internet connection


Trojans are dangerous computer threats that enter your system behind your back and then perform a list of malicious actions without you even realizing it. Trojan:Win64/Sirefef.L is one of these Trojans that can cause you a lot of trouble if they are not removed on time. Even if you do not think that your computer might be infected, it is a good idea to perform regular system scans with SpyHunter free scanner. Should you detect the Trojan infection on your computer, do invest in a reliable antimalware tool that will help you remove Trojan:Win64/Sirefef.L immediately.

The Trojan itself comes from a huge family of malware, and it is one of the 64-bit components of Win32/Sirefef group. These Trojans are responsible for modifying your search results and then redirecting you to random websites in order to generate pay-per-lick advertising revenue. Trojan:Win64/Sirefef.L is only one single component from this family, and it means that if you are infected with this Trojan, then it is very likely that other malicious files from the same group are also present in your system.

There are not distinctive infection symptoms for Trojan:Win64/Sirefef.L, so constant browser redirections to questionable commercial websites may be the only sign that you are infected with the Trojan. Either way, you need to take a serious care of your computer’s system, because once such Trojan as Trojan:Win64/Sirefef.L is in, it performs a number of unsolicited actions, such as connecting to a remote command and control center, downloading update information, collecting sensitive information on your PC and then uploading it to cyber criminals.

What is more, Trojan:Win64/Sirefef.L can possible disable some security features on your built-in system security programs. The infection successfully lowers down the security level of your system, thus making it more vulnerable to other attacks. In a sense, Trojan:Win64/Sirefef.L is not as dangerous itself as compared to other infection that could slither into your system following its lead.

One of the reasons why you may notice the infection at first is that Trojan:Win64/Sirefef.L may be hidden from the detection of security products by other components of the Sirefef family. Therefore, in order to terminate this infection, you need to invest in a powerful computer security application that will check for other possible infections and then remove Trojan:Win64/Sirefef.L along with other dangerous threats. Do take your system security seriously and get rid of malicious programs right now.

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How to manually remove Trojan:Win64/Sirefef.L

Files associated with Trojan:Win64/Sirefef.L infection:


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