1. Symantec/
  2. Security Response/
  3. VBS.Celeron.Worm

VBS.Celeron.Worm - Removal

Risk Level 1: Very Low

Discovered:
December 23, 2002
Updated:
February 13, 2007 11:54:18 AM
Type:
Worm
Systems Affected:
Windows

The following instructions are for all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines. On Windows 95/98/Me systems, if the worm deleted the Autoexec.bat file, replace it from a clean backup.
  1. Update the virus definitions.
  2. Run a full system scan and delete all the files detected as the VBS.Celeron.Worm.
  3. Delete the values

    Run C:\WINDOWS\system32\Ken32.vbs
    Windll C:\WINDOWS\system\Scrip.txt.vbs

    from the registry key

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
For further details, read the following instructions.

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, look at the Virus Definitions (LiveUpdate) line at the top of this writeup.
  • 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, look at the Virus Definitions (Intelligent Updater) line at the top of this writeup.

    The 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.

Scanning for and repairing the infected files
  1. Start your Symantec antivirus software 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.Celeron.Worm, click Delete.

Deleting the value from the registry

CAUTION: Symantec strongly recommends 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 the specified keys only. Read the document How to make a backup of the Windows registry for instructions.
  1. Click Start, then click Run. (The Run dialog box appears.)
  2. Type regedit and then click OK. (The Registry Editor opens.)
  3. Navigate to the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run.
  4. In the right pane, delete the values:

    Run C:\WINDOWS\system32\Ken32.vbs

    Windll C:\WINDOWS\system\Scrip.txt.vbs

  5. Exit the Registry Editor.


Writeup By: Yana Liu

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