Trojan Win64/Sirefef.AK is one of the famous Trojan which attempts to infect PC system and modify PC settings maliciously. Trojan:Win64/Sirefef.AK is part of the Alureon family virus that are similar to Win64/Alureon.gen!L and Trojan:win64/alureon.gen!b infections. This Trojan will not display any alert message on PC screen however, it will change search results and generates pay-per-click advertising revenue for its controllers. In most of the cases, PC users realize that their computers have been infected by Win64/Sirefef.AK because of the scanning result from anti-virus software installed on PC. Win64/Sirefef.AK is a high risky PC threat which has been circulating for a couple of years. This infection should be removed immediately so that the victims can avoid further damage and troubles generated by this Trojan. The programmer of such malware will always steal your bank account, passwords, credit card, important data and other personal privacy through Trojan and system vulnerability. Furthermore, Trojan Win64/Sirefef.AK will change Windows operating system registry settings and other important windows system files. The primary effect of Trojan:Win64/Sirefef.AK infection on PC is that it suddenly becomes less responsive that normal. Even after rebooting computer, it usually continuous and monitor system resources of the computer. Due to this Trojan:Win64/Sirefef.AK infection, system shows high percentage of processor or processor already in use, even when a computer user not running any application. If Windows users ignore Trojan Win64/Sirefef.AK, they would get more derivatives from this infection.
Windows system can be infected by the Trojan Win64/Sirefef.AK from different ways. All people who use the computer should be aware of how to properly use the computer and protect it from malicious software. VilmaTech will introduce manual Trojan removal instruction and some tips about how to avoid being infected by the Trojan Win64/Sirefef.AK and other PC threats. Here are some symptoms happened on the infected computer:
* Google, Yahoo Searches are redirected. Desktop background image and Browser homepage settings are changed. This is a common symptom of a very serious Trojan:Win64/Sirefef.AK infection.
* Trojan:Win64/Sirefef.AK slows down computer considerably and the victims will feel like their computers are stuck. This includes opening programs, shutting down the computer, and slow Internet.
* Windows users will get many unwanted pop ups. Trojan:Win64/Sirefef.AK corrupts their windows registry and uses it to deploy annoying pop up ads out of nowhere.
Win64/Sirefef.AK can be eliminated by the PC security programs and of course it also can be removed manually. People can follow the step-by-step instruction from VilmaTech expert as below to remove Win64/Sirefef.AK by hand.
Step One: Reboot Your Computer. Press”F8” on the keyboard before the Windows system has been launched.
Step Two: Press CTRL+ALT+DEL or CTRL+SHIFT+ESC（this operation varies by different operating systems）. Open the Windows Task Manager.
If it didn’t work, try another way by pressing the Start button and click on the Run option. This will start the Run tool. Type taskmgr in the blank and press OK. This can help you open the Task Manager.
Step Three: Click on Processes tab. Find the process by the name of random.exe. Then scroll the list to find required processes. Select it with your mouse or arrow keys on the keyboard and click on End Process button.
Step Four: Click “Start” menu — “Control Panel”. Search out the “Folder Options” and show hidden files in this area.
Step Five: Press Windows+R keys and then type regedit in Run box to open Registry Editor. Then delete the registry entries:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “.exe”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings “CertificateRevocation” = ’0′
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings “WarnonBadCertRecving” = ’0′
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop “NoChangingWallPaper” = ’1′
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations “LowRiskFileTypes” = ‘/{hq:/s`s:/ogn:/uyu:/dyd:/c`u:/bnl:/ble:/sdf:/lrh:/iul:/iulm:/fhg:/clq:/kqf:/`wh:/lqf:/lqdf:/lnw:/lq2:/l2t:/v`w:/rbs:’
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments “SaveZoneInformation” = ’1′
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System “DisableTaskMgr” = ’1′
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system “DisableTaskMgr” = ’1′
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Download “CheckExeSignatures” = ‘no’
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main “Use FormSuggest” = ‘yes’
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced “Hidden” = ’0′
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced “ShowSuperHidden” = 0′
Step Six: Delete the relevant files in the system:
%AllUsersProfile%\Application Data\~
%AllUsersProfile%\Application Data\~r
%AllUsersProfile%\Application Data\.dll
%AllUsersProfile%\Application Data\.exe
%AllUsersProfile%\Application Data\
%AllUsersProfile%\Application Data\.exe
%UserProfile%\Desktop\Trojan:Win64/Sirefef.AK.lnk
%UserProfile%\Start Menu\Programs\Trojan:Win64/Sirefef.AK\
%UserProfile%\Start Menu\Programs\Trojan:Win64/Sirefef.AK\Uninstall Trojan:Win64/Sirefef.AK.lnk
%UserProfile%\Start Menu\Programs\Trojan:Win64/Sirefef.AK\Trojan:Win64/Sirefef.AK.lnk
%AllUsersProfile%\~
%AllUsersProfile%\~r
%AllUsersProfile%\.dll
%AllUsersProfile%\.exe
%AllUsersProfile%\
%AllUsersProfile%\.exe
%UserProfile%\Desktop\Trojan:Win64/Sirefef.AK.lnk
%UserProfile%\Start Menu\Programs\Trojan:Win64/Sirefef.AK\
%UserProfile%\Start Menu\Programs\Trojan:Win64/Sirefef.AK\Uninstall Trojan:Win64/Sirefef.AK.lnk
%UserProfile%\Start Menu\Programs\Trojan:Win64/Sirefef.AK\Trojan:Win64/Sirefef.AK.lnk
Step Seven: Restart the computer to make the changes effect.
After you accomplish steps above, the Trojan:Win64/Sirefef.AK should be removed successfully from your computer.
Windows users should follow the tips to avoid getting malware, viruses, Trojan and spyware.
1. Never open an attachment from unknown email. Stay on alert for files that claim to be Christmas’s greeting cards, romantic videos, etc.
2.Do not click on any links on un-trusted website. Most of the risky website will redirect PC users to other places and install the viruses automatically without any permission of users.
3. Be more cautions when using the USB drives. Plugging someone else’s USB drive into the computer can spread an infection via the drive itself, not the file they’re actually trying to share.
4. Install PC security program on your computer and run it to scan the PC system regularly. This may detect and remove the potential PC threats in time.
5. Set up the Windows Update to automatically download patches and upgrades. This will allows computer to automatically download any updates to both Windows and Internet Explorer.
However, the virus publisher will make the Trojan more and more complicate. It becomes more harder to be found and removed. Therefore, the method VilmaTech introduces to you is not guaranteed to 100% remove the Trojan Win64/Sirefef.AK. It will generate mutative virus in very short time. In such situation, PC users should take pertinence measures to remove and eliminate the Trojan Win64/Sirefef.AK. If you don’t know how to do that correctly, you can have a live chat with VilmaTech experts.
For more information of Trojan Win64/Sirefef.AK
