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 Disinfection

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

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



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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