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.Tuna

VBS.Tuna

Discovered:
20 January 2003
Updated:
13 February 2007
Systems Affected:
Windows

VBS.Tuna is a Visual Basic add-in script that attempts to spread using Microsoft Office. If the date is November 19th, VBS.Tuna displays a message with a poem, and if it is run before noon, it displays a second message with references to tuna.

The virus writer intended that VBS.Tuna run as a stand-alone module. It has not been reported in the wild.

Antivirus Protection Dates

  • Initial Rapid Release version 21 January 2003
  • Latest Rapid Release version 20 August 2008 revision 017
  • Initial Daily Certified version 21 January 2003
  • Latest Daily Certified version 20 August 2008 revision 016
  • Initial Weekly Certified release date 22 January 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

VBS.Tuna is intended to spread using Microsoft Office. When VBS.Tuna is run, it resets the security to low and disables alerting. It also changes the colors of Microsoft Office documents.


The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.
  1. Update the virus definitions.
  2. Run a full system scan and delete all the files detected as VBS.Tuna.

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

1. 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 the 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), in the "Protection" section, 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, refer to the Virus Definitions (Intelligent Updater), in the "Protection" section, 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.

2. 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.Tuna, click Delete.


Writeup By: Maryl Magee