Oct 7, 2013

Trojan:Win32/Sefnit.AS – How to Remove

I keep getting a message from Windows Defender saying my computer is infected with Trojan:Win32/Sefnit.AS virus. Every time I remove it from the computer, it appears again after I restart my computer. It seems that Microsoft is not able to catch this virus  now. So how do I get rid of this virus from my computer?

Cannot Remove Trojan:Win32/Sefnit.AS Virus?

Trojan:Win32/Sefnit.AS is another variant from Sefnit Trojan Family used to attack vulnerable computers running with 32 bits. This tricky Trojan is able to exploit certain security flaw in Java and then sneak into the target computer without any notice. Also it has the capability to get inside the computer without being caught by installed anti-virus software. Mostly, this Trojan comes by clicking malicious code or distribute unsafe advertising pop-ups, visiting pornographic website or downloading attachment from spam emails. Once inside, it can mess up your system settings, infect the services of your computer or corrupt other legitimate processes. And it is also capable of opening backdoor vulnerabilities and downloading new threats on your computer. If your computer is already infected by Trojan:Win32/Sefnit.AS virus, an immediate removal is needed.

This Trojan is responsible for installing other Sefnit component such as Trojan:Win32/Sefnit.AU virus on your computer secretly. When both Trojan viruses are downloaded on your computer and initiate their attacks, your computer will be at risk. You will notice some system settings are changed without your permission and also the performance of the machine reduces to a half as well as your Internet connection. It takes a long time for you to open a webpage or run program. And you may also find that Internet browser is hijacked and keeps redirecting you to other websites you don’t want. Apart from these visible symptoms, this virus could contact a remote server and download other malware including Ransomware, Rogue programs on your computer. And it allows an attacker to steal sensitive information including user name and passwords that are stored on the PC. Due to the fact that your privacy could be seriously damaged and you could be in the face of huge financial loss of crisis, it is suggested users to get rid of Trojan:Win32/Sefnit.AS virus as quickly as possible.

Other Corrupted Activities of This Trojan Horse Include:

1. This virus slows down your computer speed which make you in a trouble while opening program and surfing Internet. It takes forever to open a program or website.
2. Antivirus you have installed keeps popping up messages while you are surfing on the internet showing you the computer is at risk but you can’t get rid of it all.
3. This virus will shut down your other anti-virus and anti-spyware programs. And it will also infect and corrupt your registry, leaving your computer totally unsafe.
4. This virus will disable the proper running of many different programs or even disable some functions of your computer.
5. System restore can’t help to remove this Trojan completely.

About Trojan:Win32/Sefnit.AS Virus Removal:

Trojan:Win32/Sefnit.ASVirus is able to disable antivirus programs so that it cannot even be detected or removed by antivirus programs, you need to manually remove it out of the computer. And in case that any mistake might occur and cause unpredictable damages, please spend some time on making a backup beforehand. Then follow these steps given as below:

1. Show hidden files and folders.

Open Folder Options by clicking the Start button, clicking Control Panel, clicking Appearance and Personalization, and then clicking Folder Options.

Click the View tab.

Under Advanced settings, click Show hidden files and folders, uncheck Hide protected operating system files (Recommended) and then click OK.

2. Open Registry entries. Find out the malicious files and entries related to Trojan:Win32/Sefnit.AS virus and then delete all.

Attention: Always be sure to back up your PC before making any changes.

a. Press the “Start” button and then choose the option “Run”. In the “Open” field, type “regedit” and click the “OK” button.

b. All malicious files and registry entries that should be deleted:


HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Temp

Video Shows You How to Safely Modify Windows Registry Editor:

Trojan:Win32/Sefnit.AS is a high-risk Trojan that will create a secret backdoor into your computer. This allows hackers to easily access your computer. It also gives the hackers a great way to put additional viruses or software onto your computer. This virus is tricky, it injects its process to legitimate Windows system files, driver files, and DLL files so that antivirus program cannot find a way to remove it automatically even though Windows Defender or Microsoft Security Essentials keeps reporting this virus is in your PC. Once it is downloaded, it decreases your PC performance sharply, and you will notice that your browser is acting weirdly, your homepage can be changed to other unknown pages against your will. And sometimes error messages and pop-up warnings may show up on your computer screen constantly without giving you any option to close it down. More than that, system or program failures happen in the middle of your work so that you may lose your data without having time to save them. Trojan:Win32/Sefnit.AS virus endangers the privacy of computer users that should be removed as soon as possible.

Note: If you are confused with the manual guide above, please contact experts from Yoocare Online Tech Support for further help.

Published by & last updated on October 7, 2013 11:41 am

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