Design and implementation of a computerized online examination system for staff recruitment
April 6, 2019
Electronic payment system and business performance
April 10, 2019

Price: 4000 Naira (BSC, MSC)

CHAPTER ONE

INTRODUCTION

1.1 Background of the Study
A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers. Often, it uses a computer network to spread itself, relying on security failures on the target computer to access it. Worms almost always cause at least some harm to the network, even if only by consuming bandwidth, whereas viruses almost always corrupt or modify files on a targeted computer.
Many worms are designed only to spread, and do not attempt to change the systems they pass through. However, as the Morris worm and Mydoom showed, even these “payload-free” worms can cause major disruption by increasing network traffic and other unintended effects.
The actual term “worm” was first used in John Brunner’s 1975 novel, The Shockwave Rider. In that novel, Nichlas Haflinger designs and sets off a data-gathering worm in an act of revenge against the powerful men who run a national electronic information web that induces mass conformity. “You have the biggest-ever worm loose in the net, and it automatically sabotages any attempt to monitor it… There’s never been a worm with that tough a head or that long a tail!”
On November 2, 1988, Robert Tappan Morris, a Cornell University computer science graduate student, unleashed what became known as the Morris worm, disrupting a large number of computers then on the Internet, guessed at the time to be one tenth of all those connected. During the Morris appeal process, the U.S. Court of Appeals estimated the cost of removing the virus from each installation at between $200 and $53,000; this work prompted the formation of the CERT Coordination Center and Phage mailing list. Morris himself became the first person tried and convicted under the 1986 Computer Fraud and Abuse Act.
A computer virus is a type of malicious software that, when executed, replicates itself by modifying other computer programs and inserting its own code. When this replication succeeds, the affected areas are then said to be “infected” with a computer virus.
Virus writers use social engineering deceptions and exploit detailed knowledge of security vulnerabilities to initially infect systems and to spread the virus. The vast majority of viruses target systems running Microsoft Windows, employing a variety of mechanisms to infect new hosts, and often using complex anti-detection/stealth strategies to evade antivirus software. Motives for creating viruses can include seeking profit (e.g., with ransomware), desire to send a political message, personal amusement, to demonstrate that a vulnerability exists in software, for sabotage and denial of service, or simply because they wish to explore cybersecurity issues, artificial life and evolutionary algorithms.
Computer viruses currently cause billions of dollars’ worth of economic damage each year, due to causing system failure, wasting computer resources, corrupting data, increasing maintenance costs, etc. In response, free, open-source antivirus tools have been developed, and an industry of antivirus software has cropped up, selling or freely distributing virus protection to users of various operating systems. As of 2005, even though no currently existing antivirus software was able to uncover all computer viruses (especially new ones), computer security researchers are actively searching for new ways to enable antivirus solutions to more effectively detect emerging viruses, before they have already become widely distributed.
The term “virus” is also commonly, but erroneously, used to refer to other types of malware. “Malware” encompasses computer viruses along with many other forms of malicious software, such as computer “worms”, ransomware, spyware, adware, Trojan horses, keyloggers, rootkits, bootkits, malicious Browser Helper Object (BHOs), and other malicious software. The majority of active malware threats are actually trojan horse programs or computer worms rather than computer viruses. The term computer virus, coined by Fred Cohenin 1985, is a misnomer. Viruses often perform some type of harmful activity on infected host computers, such as acquisition of hard disk space or central processing unit (CPU) time, accessing private information (e.g., credit card numbers), corrupting data, displaying political or humorous messages on the user’s screen, spamming their e-mail contacts, logging their keystrokes, or even rendering the computer useless. However, not all viruses carry a destructive “payload” and attempt to hide themselves—the defining characteristic of viruses is that they are self-replicating computer programs which modify other software without user consent.
1.2 Statement of the Problem
The problem at hand deals with issues pertaining to computer system information security. Computer virus still seems to be infancy stage in developing African countries despite the fact that some measures have been taken on the control of viruses by introducing anti-viruses. Based on the above facts there is need to study the effect of virus on a computer system and its tremendous impacts.
1.3 Aim of the Study
The very aim of this research work is to provide a security measure against threats facing information technology. The analysis will benefit the management of any organization, individual users, professional, and enhanced computer system life span.
1.4. Objective of the Study
The main objective of the study is to find out the effect of computer virus infection on computer file management of Business Enterprise. This research work intends to plough out some basic facts about the computer virus and its effect on computer system.
However, the objectives of this research work are;
i. To demonstrate the effect of computer virus
ii. To enlighten computer users on what attract the virus to the computer system
iii. To also enlighten computer users on how to control the effect of computer viruses
iv. To provide a framework for discussing a wider variety of virus related issues.
v. Examine the Nature of computer virus infection.
vi. Find out the effect of infection on productivity of business enterprise.
vi. Report the maintenance work down on infected systems.
1.5 Research question
In other to achieve the objectives of this research work, the following questions are to be considered:
i. Have you ever experienced virus infection before?
ii. Does your system get infected with virus through flash drive or external memory?
iii. Does your computer system get infected with virus anytime you browse in the café?
iv. Do you encounter hardware component failing to function as a result of virus infections?
v. When virus affects your system, does it corrupt the operating system?
1.6 Significance of the Study
The main importance of this research work is to make know to the public the effect of virus/worms on computer file and the solutions or remedies that can be taken to prevent and eradicate virus and worms. Also this research work we help other research to get tangible information.
1.7 Scope of the Study
The scope of this study is centered on the analysis and examining the effect of virus/worms on computer file.
1.8 Limitation of the Study
The research work is limited to effect of virus/worms on computer file management. The main constraint of the research is divided into the following parts.
• Time constraints- due to the short time given for the study, the researcher could not get all the required information needed for the study.
• Finance- as a result of money constraint the researcher had not enough money to carry out the study beyond the level. The researcher could not visit places where necessary information relevant to the study could be obtained.
1.7 Definition of Terms
Computer Virus: A computer virus is a type of malicious software that, when executed, replicates itself by modifying other computer programs and inserting its own code. When this replication succeeds, the affected areas are then said to be “infected” with a computer virus.
Computer Worms: A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers. Often, it uses a computer network to spread itself, relying on security failures on the target computer to access it.
Computer File: A computer virus is a type of malicious software that, when executed, replicates itself by modifying other computer programs and inserting its own code. When this replication succeeds, the affected areas are then said to be “infected” with a computer virus

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