Backdoor.Fearic - Removal

NOTE: These instructions are for all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

1. Update the virus definitions, run a full system scan, and delete all files that are detected as Backdoor.Fearic or Backdoor.Fearic.Cli.
2. Remove the text that the Trojan added to the C:\Windows\Win.ini file.
   

For details on how to do this, read the following instructions.

To scan for and delete the infected files:

1. Obtain the most recent virus definitions. There are two ways to do this:
   • Run LiveUpdate. LiveUpdate is the easiest way to obtain virus definitions. These virus definitions have undergone full quality assurance testing by Symantec Security Response and are posted to the LiveUpdate servers one time each week (usually Wednesdays) unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, look at the Virus Definitions (LiveUpdate) line at the top of this write-up.
   • Download the definitions using the Intelligent Updater. Intelligent Updater virus definitions have undergone full quality assurance testing by Symantec Security Response. They are posted on U.S. business days (Monday through Friday). They must be downloaded from the Symantec Security Response Web site and installed manually. To determine whether definitions for this threat are available by the Intelligent Updater, look at the Virus Definitions (Intelligent Updater) line at the top of this write-up.
     
     Intelligent Updater virus definitions are available here. For detailed instructions on how to download and install the Intelligent Updater virus definitions from the Symantec Security Response Web site, click here.
     
2. Start Norton AntiVirus (NAV), and make sure that NAV is configured to scan all files.
   • Users of NAV Consumer products should read the document How to configure Norton AntiVirus to scan all files.
   • Users of NAV Enterprise products should read the document How to verify a Symantec Corporate antivirus product is set to scan all file.
     
3. Run a full system scan.
4. Delete all files that are detected as Backdoor.Fearic or Backdoor.Fearic.Cli.

To edit the Win.ini file:

NOTE: (For Windows Me users only) Due to the file protection process in Windows Me, there is a backup copy of the file you are about to edit in the C:\Windows\Recent folder. We recommend that you delete this file before you continue with the steps in this section. To do so using Windows Explorer, go to C:\Windows\Recent, and in the right pane select the Win.ini file and delete it. It will be regenerated as a copy of the file that you are about to edit when you save your changes to that file.

1. Click Start, and click Run.
2. Type the following, and then click OK.
   
   edit c:\windows\win.ini
   
   The MS-DOS Editor opens.
   
   NOTE: If Windows is installed in a different location, make the appropriate substitution.
   
3. In the [windows] section of the file, look for these two lines:
   
   Load = "C:\Windows\config\explorer.exe"
   Open = "C:\Windows\config\explorer.exe"
   
4. If they exist, select the entire line. Be sure that you do not select any other text, and then press Delete.
5. Click File, click Exit, and then click Yes to save the changes.

Technical Details