In 1989, for example, Ghostball was released. This was the first virus capable of attacking various types of targets. Before Ghostball, viruses were classified by their attack, as " file infector " " or boot sector virus ". Ghostball was the first Multilateral virus, because it could follow several attack patterns.
In 1990, a programmer named Mark Washburn showed a polymorphic virus. Called 1260. This virus can actually change the structure of its own code of meaning, each time a new infection, he looked different, doing the same thing. Indeed, this type of virus hides " " of antivirus software through the use of disguises.
Michelangelo was the first virus to reach stardom. It was discovered in 1991, and was planned to cause incredible amount of damage when he arrived, it trigger date, March 6, 1992 (March 6 is the anniversary of Michelangelo). If an infection is initiated on March 6, the virus will erase the hard drive. Despite doomsday warnings by the press and industry of anti " at least five million infected systems " risk, only about 10000-20000 computers in the world were hit by virus.
The Concept virus was discovered in 1995. Concept is the abbreviation for " Proof of Concept ", and is designed to demonstrate how the virus can be written in the language macro programmed in Microsoft Word. In 2004, approximately 75% of all viruses are macro viruses.
The CIH virus, later renamed " Chernobyl ", appeared in 1998. That was very damaging virus that not only was programmed to erase hard drives, but also tried to erase BIOS chips. For the first time in history, a virus was able to really damage the hardware was running. Fortunately, CIH was not very good for it, and only a handful of damaged systems.
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