Win32/sirefef.FC is a malicious trojan infection that detected by Eset Smart Security. It can sneak into target computers without any awareness and open a backdoor which allows a remote attacker to control the infected computer. When this Trojan is installed, it will perform all kinds of evil actions.
The dangerous Trojan can slow down the infected computer and make its removal very difficult since it is located in C:\Windows\system32\services.exe which belongs to system file. Once running on the background, it will create a backdoor and connect to a remote server, allowing a remote attacker to gain control on the compromised computer. It will download malicious files to the computer without permission which will cause security danger as well. In a word, Win32/sirefef.FC may represent security risk for the compromised system and its network environment. You should have it deleted without any hesitation.
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 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\Winlogon\”Shell” = “[Win32/sirefef.FC].exe”
If you failed to remove this Trojan with the instructions above or need any assistant, you are welcome to contact YooCare experts to resolve all the problems completely.
Published by Sarah Poehler on July 18, 2012 | How to Guides