Computer Viruses

Topics: Computer virus, Computer, Malware Pages: 13 (4229 words) Published: February 15, 2014
Republic of the Philippines
Sarmiento Campus
Kaypian Road, San Jose Del Monte Bulacan


A case study presented to

Dr.Pedro D. Abanador

In partial fulfilment of the requirements in the subject
RES323- Research Methodologies
Leading to the degree
Bachelor of Science in Information Technology

Presented by:

Estimada, Ronald B.

February 4, 2014



A computer virus is a small software program that spreads from one computer to another and interferes with computer operation. A computer virus might corrupt or delete data on a computer, use an email program to spread the virus to other computers, or even delete everything on the hard disk, and also spread through downloads on Internet. They can be hidden in pirated software or in other files or programs that you might download. Including the first Internet Worm, were written as experiments or pranks. Today, malicious software is used primarily to steal sensitive information of personal, financial, or business importance by black hat hackers with harmful intensions. Worms spread automatically through email messages, networks, or operating system vulnerabilities, frequently overwhelming those systems before the cause is known. Worms aren’t always destructive to computers, but they usually cause computer and networks performance stability problems. A computer virus is a program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes. Viruses can also replicate themselves. All computer viruses are man-made. A simple virus that can make a copy of it over and over again is relatively easy to produce. Even such a simple virus is dangerous because it will quickly use all available memory and bring the system to a halt. An even more dangerous type of virus is one capable of transmitting itself across networks and bypassing security systems. Since 1987, when a virus infected ARPANET, a large network used by the Defense Department and many universities, many antivirus programs have become available. These programs periodically check your computer system for the best-known types of viruses. Some people distinguish between general viruses and worms. A worm is a special type of virus that can replicate it and use memory, but cannot attach it to other programs.

In 1984 Fred Cohen from the University of Southern California wrote his paper "Computer Viruses – Theory and Experiments”. It was the first paper to explicitly call a self-reproducing program a "virus", a term introduced by Cohen's mentor Leonard Adleman. In 1987, Fred Cohen published a demonstration that there is no algorithm that can perfectly detect all possible viruses. Fred Cohen's theoretical compression virus was an example of a virus which was not malware, but was putatively benevolent. However, antivirus professionals do not accept the concept of benevolent viruses, as any desired function can be implemented without involving a virus (automatic compression, for instance, is available under the Windows operating system at the choice of the user).

The results come despite 95 per cent of people claiming to use antivirus or firewall software, according to the findings from Of those who have suffered an attack, 39 per cent described the assault as causing a major disruption to their system. A further one in 10 (10 per cent) said the attack, rendering their computer unusable, and one in twenty (5 per cent) admit to having personal information stolen. The survey of 2,088 adults found that almost one in 10 (9 per cent) admitted experiencing the virus after visiting an 'adult' website. These kinds of attacks are most common among men (27 per cent compared to 21 per cent of women) and the younger generations, with 38 per cent of...
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