Threat Description

Prague

Details

Aliases: Prague, Backtime
Category: Malware
Type: Virus
Platform: W32

Summary


This virus was found in August 1991. It contains the texts 'Backtime' and turns the system timer to work backwards.



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.



Technical Details



Variant:Blinker

Slightly shorter, only 512 bytes. Displays the following error messages occasionally:

    Bad command  error reading device CON    Bad command  error writing device CON  

Variant:Shaker

This variant is also 512 bytes, but it produces a very interesting "shaking" effect on the screen, when run, as the virus interferes with the video controller. This version contains the text "Shaker"


Variant:Pizza (Plastic Pizza)

This 1236 bytes long variant carries a copy of the Michelangelo virus with itself, and will infect all clean hard drives it spots with it.






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