Threat description


Category: Malware
Type: Worm
Platform: W32


Voltan is a mass mailing worm that was found late evening on October 24th, 2003.

The worm arrives in emails which contain a link to a web page from where a file could be downloaded. The emails contain text in Italian.


Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

The mass-mailing routine of Voltan does not send the worm in the email. It sends a link to a website which first displays a message:

Il momento - catartico... per parafrasare un noto comico di ZELIG !!!   [The moment is cathartic... to paraphrase a famous comedian from ZELIG !!!]   

then offers a file named 'zelig.scr' for download. 'zelig.scr' is to body of the worm.

When the file is opened it opens a webpage in the default browser with the following content:

Congratulazioni !  Il "CATARTICO" screen saver - stato installato con successo .   [Congratulations !   The CATHARTIC screen saver has been successfully installed]   

It creates a value in the registry as

'HKLM\Control Panel\Screen Saver.Marquee\text'   

with the text:

A volte ti sento cos? vicina...A volte ti sento cos? lontana  ...Certo che hai proprio un cellulare di m**da!   [Sometimes I can feel you so close...Sometimes I feel you so   distant ...You sure have a sh*tty cell phone!]   

To send emails Voltan first locates the Windows Address Book and reads the list of contacts from there. Using its own SMTP engine it sends the following emails to the contacts:

From: user@of.infected.computer  To: friend@of.the.user.of.the.infected.computer  Subject: Il momento e' catartico [The moment is cathartic]   Body: Ricevo e cortesemente inoltro,.... un premio per la genialita  hanno reso mitico un salva schermo scaricalo, "poesie catartiche",  che non sai cosa ti perdi   ciao   [I received this and I'm forwarding it,... an award to genius   they made this great a screen-saver download it, "cathartic poems",   you don't know what you're missing]   

If the worm can not find the email address of the user of the infected computer it uses a hardcoded address instead.

Voltan uses system DLLs which are not available on some systems. The worm does not work on Windows 95/98/ME and Windows NT4.

Translations:Fabrizio Cassoni


Detection in F-Secure Anti-Virus was published on October 25, 2003 in update: Detection Type:PC

Description Details: Katrin Tocheva, Veli-Jussi Kesti.
Technical Details: Gergely Erdelyi


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