Cervivec

Summary

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Cervivec is a mass-mailer worm written in Delphi. The code body is over 600 kilobytes in size. It collects e-mail addresses from the user's ICQ contact database.

Removal

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Automatic action

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

More

Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.

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

Technical Details

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The worm installs itself to the Windows System directory as "ntkrnl.exe" and adds a value to the registry to

"Software\Microsoft\Windows\CurrentVersion\Run\Kernel Loader"  

to make sure that it will be started when the machine starts up.

It sends e-mail messages in different languages:

"Cau posilam ti cerviky tak se na to podivej (virus to neni)"  "Cau posielam ti cerviky tak sa na to pozri (virus to neni)"  "Hallo, Ich habe ein guter Witz-Wurm so sieh! (kein virus)"  "Hi, I have some cool joke - worms so have a look at it (no virus)"  "J'ai une bonne blague ca s'appelle verre de terre alors jette un coup d'oeil (il n'y a pas de virusi)"  "Czesc, mam swietnz dowci te mando los gusanilloes. Pues mirarlos (no es un virus)"  "Hola te mando los gusanilloes. Puesmirarlos (no es un virus)"  

Detection

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F-Secure Anti-Virus with the latest updates can detect this worm.

Technical Details:Gergely Erdelyi; F-Secure Corp.; March 22nd, 2002