Discovered: January 20, 2003
Updated: February 13, 2007 11:47:21 AM
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 January 21, 2003
  • Latest Rapid Release version August 20, 2008 revision 017
  • Initial Daily Certified version January 21, 2003
  • Latest Daily Certified version August 20, 2008 revision 016
  • Initial Weekly Certified release date January 22, 2003

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Writeup By: Maryl Magee

Discovered: January 20, 2003
Updated: February 13, 2007 11:47:21 AM
Systems Affected: Windows


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.

Writeup By: Maryl Magee

Discovered: January 20, 2003
Updated: February 13, 2007 11:47:21 AM
Systems Affected: Windows


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