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Category: Malware

Type: Worm

Aliases: Cervivec, I-Worm/Cervivec


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


Automatic action

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

Knowledge Base

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About the product

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Contact Support

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Submit a sample

Submit a file or URL for further analysis.

Technical Details

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 email 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)"