Yesterday was the 20th anniversary of the Michelangelo virus. If you don’t remember, on March 6, 1992, Michelangelo was programmed to overwrite the first 100 sectors of a hard drive–not quite as destructive as formatting a drive, but to the average user, the effect is the same. It was a huge scare–John McAfee predicted five million computers would be affected–but largely was a non-event.
Those of you studying for security certifications would do well to remember that Michelangelo is a prime example of a virus and a logic bomb. Viruses replicate; logic bombs do something when an event triggers. Malware doesn’t always fit neatly into specific categories–crossovers are common.