It only infects 360 kilobyte 5.25 inch floppies and hard drives com-infecting virusĬauses a warm reboot when the program is run.ĭOS virus that infects via floppy disk or disketteĪfter 4 infections, it overwrites the boot sector and file allocation table.
The virus slows down the floppy disk drive and makes seven kilobytes of memory unavailable to DOS.įloppy disk or diskette DOS. The first virus observed “in the wild.” It displayed a message but caused very little damage.
This finally reaches a threshold and crashes the computer. Makes multiple copies of itself on a single computer until it clogs the system, reducing system performance. Uses the fork system call, and can fork endlessly Virus nameĮxperimental self-replicating TENEX operating system Wormĭisplayed the message “I’m the creeper, catch me if you can!” Here is a list of prevalent system threats over the past 50 years. These threats have been created for various reasons, ranging from financial gain to a simple challenge for the hacker. Since the PC industry started in the 1970’s, hackers have created viruses to attack them and cause damage.
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