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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Tam.A

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Tam.A
Technical name:Kak.Worm.D
Threat level:Low
Alias:Tam, VBSTamA-m, VBS/Tam, VBS/Tam.A, Tam, Out, I-Worm.Kakworm.d, Tam A, VBS/Out@M, Kak.D, OUT.HTA, TAM.HTA, VBS/Kakworm.D, VBS/Out.A@M
Type:Virus
Effects:  

It displays messages on the screen on August 30, and restarts the affected computer.

Affected platforms:

MS-DOS

Detection updated on:June 5, 2003
StatisticsNo

Brief Description 

    

Tam.A is a worm that only affects the French version of Windows. On these systems, Tam.A displays a series of windows and restrats the computer, which means that all unsaved information will be lost.

In addition, Tam.A spreads via e-mail, hidden in the AutoSignature of messages sent from the affected computer.

It is very easy to become affected by Tam.A, as it is automatically activated when the message is viewed through Outlook Preview Pane. It does this by exploiting a vulnerability in Internet Explorer (versions 5.01 and 5.5), which allows files attached to e-mail messages to be automatically run.

Visible Symptoms 

    

Tam.A is easy to recognize once it has affected the computer, as on every August 30, it displays a series of messages written in French and restarts the computer:

If the user clicks OK , the worm will display the same message on five occasions.

If no button is clicked in ten seconds, the worm displays the warning message below:

On the contrary, Tam.A displays another window and restarts the computer: