How to Remove Trojan.Sirefef.GY Manually? (Trojan Removal Guide)

Having problems with a virus called Trojan.Sirefef.GY? Do you also find that it is a stubborn virus which no antivirus can handle it? This article would like to introduce some manual removal tips to help you handle it effectively.

Definition of Trojan.Sirefef.GY

Trojan.Sirefef.GY is a dangerous Trojan designed by remote attackers with purpose of swindling out of your money. It comes from Trojan Sirefef family which has many family members and has done great harm to many users lately. Trojan:Win32/Sirefef.AL and Trojan:Win32/Sirefef.AH also come from this family. How do computer users get this nasty virus without doing anything wrong on their precious computer? In fact, this virus can parasite on some links, computer devices so that once clicked on them, your computer will be infected without your notification. It also can be spread by application update from some unknown web portals. Therefore, you are easy to get such infection after you clicked on the website to make the update. Furthermore, it is a very tricky virus which can hide itself in the free software. Many users would like to choose free software but paid software when they want to download needed software to computer. After it penetrated into your system, your computer will be more vulnerable. Besides it can duplicate itself without your approval, it will illegally introduce many other malware to your computer so that your computer will be functioned slower than before. Many cyber criminals would like to use the so called “backdoor” of this Trojan to steal your personal information so that not only your computer but also your personal information is at risk. Therefore, take actions to remove this virus immediately.


Note: If you are not sure what to do to get rid of this nasty virus, please consult YooCare/YooSecurity certified professionals to remove it completely. Live chat with professionals now.

How to Judge Your Computer is Infected by Trojan.Sirefef.GY?

Although this virus is very tricky, we still have methods to pick it up.
1. Your computer runs much slower than before even you just run a few programs at the same time.
2. Some of your antivirus can report it. But we should remind you that it can’t be killed by antivirus.
3. Your computer setting or system files have been modified without your notification.
4. Your computer will receive a lot of unwanted pop ups after you turned on your computer.
5. Your computer will be shut down from time to time if you install MSE on your computer.

How to Remove Trojan.Sirefef.GY Completely?

As we can tell from the above information, this Trojan is harmful enough to damage your system. And you may find that it is very hard to remove it by antivirus. Therefore, manual removal is required.

Step 1: Press CTRL+ALT+DEL or CTRL+SHIFT+ESC. Open the Windows Task Manager.

If that didn’t work, try another way. Press the Start button and click on the Run option. This will start the Run tool. Type in taskmgr and press OK. This should start the Windows Task Manager

Step2: Stop all processes in the Windows Task Manager.

C:\WINDOWS\assembly\GAC\Desktop.ini
C:\WINDOWS\system32\ping.exe
%AllUsersProfile%\Application Data\~r
%AllUsersProfile%\Application Data\.exe

Step3: Manually get rid of registry entries created by This Nasty Virus.

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “.exe”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System “DisableTaskMgr” = ’1′
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main “Use FormSuggest” = ‘yes’

Similar video guide on how to reset Windows Registry entries:


Note: If you are not sure what to do to get rid of this nasty virus, please consult YooCare/YooSecurity certified professionals to remove it completely. Live chat with professionals now.

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