Threat Description

Z-90

Details

Aliases: Z-90
Category: Malware
Type: Virus
Platform: W32

Summary


Z-90 activates in July and December if an infected file is executed and the time is exactly 09:03. At this time the virus encrypts the DOS boot sector of drive C:, making the PC unbootable (encryption is done by XORing with 16-bit hex value 0903). After this it displays this message:

VIRUS Z-90. JUNIO 95. M         EXICOSE MURIO TU DISCO         DUROTU LO PUEDES RE         VIVIRHAS BAILADO ALGUNA VEZ CON TU NOVIA A LE TENUE LUZ DE LA 		  

Z-90 was found in the wild in Brazil in April 1996.



Removal


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.







Description Details: Peter Szor, F-Secure, 1996


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