Threat Description

Voltan

Details

Aliases:Voltan, W32/Voltan.A@mm, I-Worm.Voltan, Marque, Voltan.A
Category:Malware
Type:Worm
Platform:W32

Summary



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.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.



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


Detection in F-Secure Anti-Virus was published on October 25, 2003 in update:
Detection Type: PC
Database: 2003-10-25_03



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


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