Classification

Category: Malware

Type: Virus

Aliases: Prague, Backtime

Summary


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

Removal


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

Find the latest advice in our Community Knowledge Base.

About the product

See the manual for your F-Secure product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

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.