Backdoor.EggHead - Removal

Delete files detected as Backdoor.EggHead, delete the legitimate files that are dropped by the Trojan, and remove references that it added to the registry.

To delete the Trojan itself:

1. Run LiveUpdate to make sure that you have the most recent virus definitions.
2. Start Norton AntiVirus (NAV), and make sure that NAV is configured to scan all files. For instructions on how to do this, read the document How to configure Norton AntiVirus to scan all files.
3. Run a full system scan.
4. Delete all files that are detected as Backdoor.EggHead.

To delete the legitimate files that it dropped:
Use Windows Explorer to delete the \%systemroot%\System32\Vchost folder. Also, open the %systemroot% folder, and delete any of the following files that are still there after running the scan:

• Services.exe
• Pskill.exe
• B.bat
• Tcpsvcs.exe
• Good_client.exe

NOTE: %systemroot% is a variable. On default installations of Windows NT/2000/XP systems, this is C:\Winnt.

To edit the registry:

CAUTIONS:

• We strongly recommend that you back up the registry before you make any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify only the keys that are specified. Read the document How to back up the Windows registry for instructions.
• The removal of the keys or values can be somewhat complicated. The entire key should be removed if nothing else is in it other than the values that are noted in the write-up, and if it has no other subkeys. However, in some cases, the key may have other values or subkeys that were added when the system was installed or during the installation of other programs. If you are not sure of what to do for a particular key, we suggest that you obtain the services of a qualified computer consultant.

1. Click Start, and click Run. The Run dialog box appears.
2. Type regedit and then click OK. The Registry Editor opens.
3. Browse to and select in turn each of the keys described (in bold) in the Technical Description. Either delete the key itself if it contains no values or subkeys other than as shown, or delete the values that were added.
4. Exit the registry editor when finished.

Technical Details