History of Computer Viruses
The history of viruses is very interesting because it started as a game in 1950s when Bell labs develop an experimental game when the players attack each other imagines a computer "worm" that spread across networks. However, the viruses and creation then develop through years to become one of the issues all over the world .
The first computer virus called Brain which created by two brothers who were running a computer store in Pakistan in 1986. They weaned a program that could spread form PC to another. Brain was harm less because it doesn't delete the files in the computer and move on . In addition it is too easy to be discovered by the infected users by noticing the changed volume label .
After Brain, there were many other viruses developed such as Cascade, Alameda , Jerusalem and Lehigh . These viruses were more dangerous than Brain because they were able to infect .COM and .EXE files while Brain can infect the boot sector .
After Brain the programmers were trying to hide their work by programming encrypted viruses that can't be detected and disassembled easily "1260" virus was one of defect because the most of the virus code have different form in every infection .
In the same year , new viruses appears with stealth techniques . These viruses could hide and change their location in the memory to avoid detection and removal such as whale virus. These viruses made the scanning techniques less effective because it depended on fieed and predictable elements in each copy of a virus .
By 1992 the large windows – based computing community led to an increase on the boot-sector infector , but decrease the file infectors . However , these windows encouraged a new category of malware which is the macro virus . Macro is a group of user commands that can be stored and run to gather . It is a technique for automating repetitive tasks within one application.
The repetitive tasks help the macro virus instruction to infect other document concept was the first document or macro virus speeded by sharing documents between users . It can spread to different computing platform . For example , macro virus that infect Microsoft Word or Excel on a PC can spread to Macintosh .
Melisse virus is one of the document viruses that forward itself by emails . Today the internet connection help these viruses to spread more and more by sharing documents between users through the emails attachments. The most successful email virus was (Love Bug) in 2000. It spread through emails that contained an attachment called "Love Letter" . However , Microsoft reported that these viruses doesn't infect the recipients unless they open the mail and accept the attachment.
In summary , There are thousand , and thousand of different viruses these days which improve every day . However , there are many software released every day to detect and avoid these viruses. Although the wild spread of new and strong viruses, it still infect and spread only with users permission
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