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This virus doesn't activate, because of an mistake in code (the virus should activate on every Octomber 20th).

Disinfection & Removal

Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.

Technical Details

This virus doesn't contain any destructive routine - it only tries to write the following message:

   Virus napsany specialne pro inzenyra ZAKA ze SPS
     Nepodlehejte panice, mate nakazeno jen par souboru...
     (c) 1993 II.A 1988
     Tak a ted si vyzkousime treba: RESET
     Kdyby kazdy nespokojeny student
     napsal virus, tak v nasich skolach by
     ani jiny software nekolov
     al a McAfee by se divil...

After this the virus waits for a keypress and then resets the machine.

The 1376 bytes long variant is nearly identical to the Helloween.1839 described above, but it displays this message:

   Nesedte porad u pocitace a zkuste jednou delat neco rozumneho!
       !! Poslouchejte HELLOWEEN - nejlepsi metalovou skupinu !!

This variant also has a different xor-coding constant, it activates on November 1st when it reboots the machine.

Technical Details: Libor Pechacek, Libor.Pechacek@milada.troja.mff.cuni.cz

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