Short essay on computer viruses

Contents:
  1. Introduction Of Computer Virus
  2. 1. Abstracts
  3. Definition of 'Computer Virus'
  4. How to Prevent a Computer Virus from Ruining Your Day

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Introduction Of Computer Virus

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Appearing in , MyTob combined features of a bot and a mass-mailer. Along with heralding the era of cybercrime MyTob also introduced the botnet. The Storm botnet launched in and took what seemed like ages to get under control. Storm left a legacy as one of the most destructive bots in history, infecting millions of computers around the world its wake. Koobface, launched in , marked the first botnet to recruit its Zombie computers across various social networks, including Facebook, MySpace, hi5, Bebo and more.

Currently, it is estimated that at any time more than Koobface zombies are online simultaneously. In , Conficker targetted the Microsoft Windows OS and used Windows flaws and dictionary attacks on admin passwords to co-opt machines and link them to a computer that can be commanded remotely by the authors. Oddly enough, no. Ukrainian IPs or machines were infected by Conficker, suggesting that the authors were not targeting their own country.

Too many, is considered the first shot fired in a cyber war that will soon emerge. With Stuxnet targeting nuclear plants, it is said the virus landscape is changing dramatically. Appeared first in 27th January, and soon got a high rank in the list of most dangerous worms of the year. It is somehow very similar to Beast Trojan The Sadmind worm was a self-propagating piece of malware; it was first discovered on 8th May, in China.

Beast is a Windows-based backdoor trojan horse more commonly known in the underground cracker community as a RAT Remote Administration Tool. It was created in Delphi and released first by its author Tataye in The most fundamental precaution against virus attacks is to limit access to a machine to avoid tampering with the system. In case of floppy discs, the simplest form of protection is to place write-protect tabs on all discs so that any attempt by a virus to write to the disc would result in an error message.

The write-protect tab should be removed only when data has to be expressly written to the floppy. It should be remembered that even the simple act of inserting a floppy disc and getting a directory listing can be enough to infect a machine. Though, write-protect facilities are generally not available for hard discs, hardware products have started appearing in the market offering users the ability to write-protect hard discs.

But, being expensive, these are not likely to be used widely. Software products to write-protect hard discs are also available. But, these render themselves vulnerable to virus attack also. In network environments, the use of disk-less or hard-disc-only systems is becoming popular. Control of software is then restricted to the file server and network administrators only.

1. Abstracts

Even if one buys and uses several anti-virus applications, the best defence is to avoid infection in the first place. There is no absolute guarantee against infection. But, the risk can be minimised by following the guidelines listed below. User should also have some basic knowledge about viruses, their prevention and cure. Use of good anti-virus software for scanning files regularly should invariably be used by each and every user.

But, a single software cannot be depended upon to eliminate infection from ill strains of viruses. The battle against virus infection will be long and perhaps, lasting one. Delivered by FeedBurner. A list could be as follows Detection of a virus by its appearance.

Definition of 'Computer Virus'

Detection of a virus by its behaviour. Detection of evolution of a known virus. Detection of a triggering mechanism by its appearance. Detection of a triggering mechanism by its behaviour. Detection of evolution of a known triggering mechanism. Detection of a virus detector by its behaviour.

Detection of evolution of a known virus detector. Safety of a protection scheme. Boot Sector Virus This is the other major type of virus. Multipartite Viruses These combine both techniques. Companion Viruses Companion viruses create a. The word virus itself is Latin for poison.

How to Prevent a Computer Virus from Ruining Your Day

Research Papers words 4. It is an executable code able to reproduce itself. Viruses are an area of pure programming, and, unlike other computer programs, carry intellectual functions on protection from being found and destroyed. They have to fight for survival in complex conditions of conflicting computer systems. Computer viruses have pervaded popular culture at least as successfully as they have the world's computer population Free Essays words 5. Do you have anti-virus software on your computer.

You should.

What is Computer Virus? (Urdu/Hindi)

Free Essays words 6. You turn on your new I B M computer only to findThat every bit and byte of information has been erased. A computer virus hasStruck. These small bits of computer code have slowly overtaken the world ofComputing. A computer virus is a small program that attaches itself to disksAnd computer systems with instructions to do something abnormal. Sometimes theEffects of a computer virus can be harmless Free Essays words 1. A virus can be defined as? It is also considered to be? Research Papers words 2. Discuss the measures that need to be taken in order to maintain security. There is a type of computer program that is designed and written to destroy, alter or damage data stored on computers without your knowledge or permission.

These are some of the problems that these programs cause. Your computer displays annoying messages. Your computer develops strange visual and sound effects Free Essays words 2 pages. There are many distinct types of viruses and each one has a unique characteristic. Viruses are broken up into to main classes, file infectors and system or boot-record infectors.

A file infector attaches to ordinary programs usually affecting. COM and. EXE files. These two files are subject to infection though some can infect any program from which execution is requested Protection Against Viruses for All The word virus can be very disheartening, especially when computers areinvolved.

A virus is composed of instructions hidden inside a program. Theseinstructions copy themselves to other programs, a nd the cycle continuesspreading. Fortunately, help is available; antivirus software is available toanyone. Then, they were largely created inuniversity laboratories by mostly wayward geniuses keen to pit theirprogramming skills against each other Free Essays words 4. Typically, a virus spreads from one computer to another by adding itself to an existing piece of executable code so that it is executed when its host code is run.

If a virus if found, you shouldn't panic or be in a hurry, and you should work systematically. Don't rush.