Viruses are not created by accident, are written and codified by "someone" Who is this "somebody"? And Why make them?
Most writers or virus writers are never found or failing detained by the authorities, so there is little scientific information or sociological their behavior or tendencies, that is, we have to speculate why do viruses. A virus writer can be any age, gender, religion, marital status or socio-economic situation or region of the world, all it takes is some knowledge of using computers and programming.
Writing a virus is very easy specifically for scripts (programs that auto-run) and macro-viruses, they are made in Visual Basic or similar programs, which are designed for home users. When spread scripts and macro-viruses do it as source code, which makes anyone who becomes infected with what he can understand, use and modify.
The important thing is to understand that anyone who knows programmed in any language can write a virus new thing in one day, if desired.
Apparently it seems that viruses are written to show off a little, you probably do not even exist a desire to hurt (not in all cases): Some want only succeeds in the challenge of making a virus, which is technically very attractive, are not detected by anti-virus, there are those who wish to draw attention or become known through his creation, that makes them feel important. It might be wishing to appear on the front page of the newspaper or demonstrate the vulnerabilities of operating systems, mail systems, computing platforms and so on. Of course there are those who do to create a large damage systems or information and creating chaos worldwide.
The communities "underground" computer and groups of writers of viruses, hackers, crackers, etc. They affect the trend in creating new viruses, namely how they are written today... The groups Virus GSE created from the relationships among its members and the organization advanced or moderate among them. Typically will have a website (meeting point) where it appears an electronic journal published where they appear to share information among themselves, among which we find the virus code. Most of these groups are virtual, its members come from various parts of the world and are known by the Internet. Continuously come and go these groups, however during its period of existence are much more prolific in creating viruses that if they were alone.
It is commonly believed that the virus came from: United States, Russia, China, Taiwan, South Korea, Spain, India, England, Italy, France, the Slovak Republic, Canada, Australia, Sweden, Romania, Estonia, Brazil, Japan, Singapore and Holland.
Most virus writers think that viruses that "they" make and release, really cause no harm. After all, most viruses that there are not erase or destroy data, only spreads, the above is true, but it is also true that in the process of reproduction of the virus produces an "overhead" in the systems, and either by trafficking or processes that viruses carried out, this being the greatest damage. As far as each of the virus found is malicious. There are no benign virus, or the writer benign virus.