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Sirefef. How to remove? (Uninstall guide)

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Also known as Trojan.Sirefef | Type: Trojans
SpyHunter is a tool to detect malware. You need to purchase full version to remove infections.
More information about SpyHunter and steps to uninstall.

What is Sirefef?

Sirefef is a Trojan family that includes different types of parasites that all are capable of initiating different things. Every version of Sirefef viruses has it’s own task. For example: one component is set to open the backdoors of the system, another one - block the firewall and other security software, the next one can be used for downloading malicious files and updates from the internet, and so on. Besides, this trojan horse can easily hide deep inside the system and try other methods for preventing its elimination from it. In addition, some other versions of these threats can try to redirect web traffic to associated websites and try to generate pay-per-click revenue in this way. So, annoying pop up ads may be one of the signs telling you that your PC is affected by Sirefef trojan horse.

When inside the system, Sirefef trojan horse can be used for various malicious tasks. However, the most important among them is its ability to steal personal people's information, such as passwords, logins, financial information and so on. As soon as it is revealed, this data is sent to a remote server, which belongs to cybercriminals. Besides, Sirefef can be used for causing system modifications, like changing registry settings and other important settings. This may lead you to system crash and problems when trying to browse the internet. Please,do NOT let Sirefef stay on your computer! If you have even the smallest doubt about its infiltration on your computer, you should run a full system scan with updated anti-spyware, like SpyHunter, and remove this virus.

How can Sirefef infect my computer?

In most of the cases, such trojans as Sirefef can be downloaded to computer after clicking on misleading search results that are sponsored by hackers. In most of the cases, such results are displayed thru suspicious search engines. However, security experts have also revealed that Yahoo or Bing have also displayed them. Please, be really careful when searching for adobe flash player and similar programs because search results related to this program may be corrupted. They may look innocent, but this is only an image. No matter how peaceful the landing page looks like, it may have nothing in common with Adobe.

How to get rid of Sirefef virus?

Sirefef is a very malicious cyber threat. It's important to remove it from your computer, because it may not only use it and your Internet resources for illegal purposes. It can also try to delete your valuable files, steal your sensitive information and so on. Additionally, it may open a remote control connection to your PC and let additional threats inside your computer. When trying to remove Sirefef from the system, it may kill your anti-spyware and its processes. Fortunately, the developers of SpyHunter and some other reputable anti-spyware tools have found the way to delete Sirefef trojan from PC systems. That's why we highly advise you to use SpyHunter, STOPzilla or Malwarebytes Anti Malware for its removal.

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remover for Sirefef
Compatible with OS X
Webroot SecureAnywhere AntiVirus is recommended remover to uninstall Sirefef. You should confirm using free trial that it detects current version of parasite.
Not using OS X? Download a remover for Windows.
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remover for Sirefef Happiness
Compatible with Microsoft Microsoft Windows logo
SpyHunter is recommended to uninstall Sirefef. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of SpyHunter malware removal tool. More information about this program can be found in SpyHunter review. If you decided to select another anti-spyware, uninstall SpyHunter from your computer.
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What to do if failed? If you failed to remove infection using Webroot SecureAnywhere AntiVirus SpyHunter, read here how to submit a support ticket or submit a question to our support team and provide as much details as possible.
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Sirefef screenshot
Sirefef snapshot

Sirefef manual removal

Kill processes:
Unregister DLLs:

Delete files:

Geolocation of Sirefef

Map reveals the prevalence of Sirefef. Countries and regions that have been affected the most are: Spain, Canada, Italy, Germany and United States.

Removal guides in other languages

Information updated:

Comments on Sirefef

malwarebytes did not find it at found trojans and some other thingy...i went to and downloaded thier free one and it found sirefef and got rid of it in no time.
Mike in IT
Malwarebytes didnt even detect it. We have Forefront and it gets detected, but after removal it just comes right back in only a couple of minutes.
i cant access the internet, probably because of the virus. Can i download spyhunter in safe mode

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