Threat Explorer

The Threat Explorer is a comprehensive resource consumers can turn to for daily, accurate, up-to-date information on the latest threats, risks and vulnerabilities.

VBS.Taber

VBS.Taber

Discovered:
24 September 2003
Updated:
13 February 2007
Also Known As:
Worm.P2P.Tabe.b[AVP]
Systems Affected:
Windows

VBS.Taber is a worm that attempts to spread through the KaZaA file-sharing network as "Britney_and_Madonna_fucking.mov.vbs."

The worm attempts to delete C:\Windows\Explorer.exe and make some configuration changes to Internet Explorer by editing the registry keys.

The worm will only execute on Windows 95/98/Me systems.


NOTE: Virus definitions dated September 25th , 2003 or earlier may detect this threat as VBS.Annod.D.

Antivirus Protection Dates

  • Initial Rapid Release version 24 September 2003
  • Latest Rapid Release version 28 September 2010 revision 054
  • Initial Daily Certified version 24 September 2003
  • Latest Daily Certified version 28 September 2010 revision 036
  • Initial Weekly Certified release date 24 September 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When VBS.Taber is executed, it attempts to perform the following actions:
  1. Displays the message "Hello, the Britney and Madonna video is installing, please wait."

  2. Creates a copy of itself as C:\windows\Britney_and_Madonna_fucking.mov.vbs. The script will fail and exit at this point on Windows NT/2000/XP systems, and then display a Windows Script Host run-time error.

  3. Creates a shortcut to itself: C:\Britney_and_Madonna_fucking.mov.lnk.

  4. Creates the batch file, C:\lnk.bat, which searches the hard drive for the .lnk files and overwrites any found with itself.

  5. Executes C:\lnk.bat.

  6. Add the values:

    "LegalNoticeCaption" = ""
    "LegalNoticeText" = ""

    to the registry key:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Winlogon

  7. Add the values:

    "NoBrowserContextMenu" = "0"
    "NoBrowserOptions" = "0"
    "NoBrowserSaveAs" = "0"
    "NoFileOpen" = "0"
    "NoViewSource" = "0"

    to the registry key:

    HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Restrictions

  8. Add the values:

    "Advanced" = "0"
    "Cache Internet" = "0"
    "AutoConfig" = "0"
    "HomePage" = "0"
    "History" = "0"
    "Connwiz Admin Lock" = "0"
    "SecurityTab" = "0"
    "ResetWebSettings" = "0"

    to the registry key:

    HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Control Panel

  9. Adds the value:

    "NoAddingSubScriptions"="0"

    to the registry key:

    HKEY_CURRENT_USER\Software\Policies\Microsoft\InternetExplorer\Infodelivery\Restrictions

  10. Adds the value:

    "NoFileMenu" = "0"

    to the registry key:

    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\

  11. Attempts to copy itself to the C:\My Shared folder. If the folder does not already exist, the script will end with a Windows Script Host run-time Error.

  12. Adds the value:

    "DlDir0" = "C:\My Shared Folder"

    to the registry key

    HKEY_LOCAL_MACHINE\Software\KaZaA\Transfer\DlDir0

  13. Attempts to delete C:\Windows\Explorer.exe.

  14. Displays these two messages:

    The Installation cannt Install the video in your computer because the file is infected by Worm.P2P.Meliton. Checked by Kaspersky Anti-Virus

    followed by:

    Please enter to www.sex.com and Download a free of virus copy of Britney and Madonna FUCKING




The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.
  1. Disable System Restore (Windows Me/XP).
  2. Update the virus definitions.
  3. Run a full system scan and delete all the files detected as VBS.Taber.
  4. Edit the registry as needed.

For specific details on each of these steps, read the following instructions.

1. Disabling System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.

Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:
For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article, "Antivirus Tools Cannot Clean Infected Files in the _Restore Folder ," Article ID: Q263455.

2. Updating the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:
  • Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to the Virus Definitions (LiveUpdate).
  • Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted on U.S. business days (Monday through Friday). You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to the Virus Definitions (Intelligent Updater).

    The Intelligent Updater virus definitions are available: Read "How to update virus definition files using the Intelligent Updater" for detailed instructions.

3. Scanning for and deleting the infected files
  1. Start your Symantec antivirus program and make sure that it is configured to scan all the files.
  2. Run a full system scan.
  3. If any files are detected as infected with VBS.Taber, click Delete.

4. Deleting the value from the registry


WARNING: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified keys only. Read the document, "How to make a backup of the Windows registry ," for instructions.
  1. Click Start, and then click Run. (The Run dialog box appears.)
  2. Type regedit

    Then click OK. (The Registry Editor opens.)

  3. If required, reset the registry values that the worm modified. The details can be found in the "Technical Details" section. Because these settings depend on how you have your computer set up, it is not possible for us to make specific recommendations. If you are not sure which values need to be changed and to what, you may want to obtain the services of a qualified computer consultant.

  4. Exit the Registry Editor.


Writeup By: John Canavan