Malware refers to harmful software or scripts that are affect computers. Malware such as Trojan horses and viruses will be described.
The term malware is an abbreviation for "malicious software". The term is commonly used to describe any software that causes damage to computers, servers, storage systems and computer networks.
Viruses are the most common forms of malware. They are usually made of scripts or programs that multiply and spread files within a computer, server or network. They also spread files from one computer to the other. This is usually done without permission of the user. Some people define viruses as programs that trick the user or computer to install them for the purpose of corrupting deleting, or dislocating the data stored in the hard drive. This is a wrong definition. A win32 virus may not damage the data, but it is distinguished by its ability to multiply within a computer or the user does server. Mostly, the damage is done when a user attempts to eliminate the virus. Viruses are spread through downloads or e-mail attachment. They can also be spread from one computer to another through portable storage devices, like a flash drive or memory stick.
What is a worm? A worm is a virus that creates copies of itself in a computer.
Viruses can be detected and destroyed by a scanner. A scanner scans all the programs and the files in a computer. It will detect all malicious scripts hidden in the computer. After detection, the malicious software will destroyed. Programs with virus-like characteristics will also be destroyed. Viruses can be prevented from attacking your computer or server in the first place. Executable programs usually contain viruses, therefore, when you receive an executable file in your e-mail, you should delete it unless it is from a trusted source. Downloading files from unknown sources is also dangerous, as is exchanging files with other users.
Another type of malware is a "Trojan horse". A Trojan horse is a stealth program that tries to enter the computer without the user's permission or knowledge. The word Trojan horse is derived from a Greek myth about characters that pass through security walls by presenting or hiding themselves in a different form. One example of a Trojan horse is the 'swen virus' that presented itself as a Microsoft application.
Trojans can steal, destroy or alter the data as soon as they start. Memory stored in a hard drive can be erased, and information such as credit card numbers, passwords and other secret details can be stolen. Mostly, Trojan horses are designed to be destructive, and thus, they pose a great threat. Viruses and worms may be the result of an unintentional error caused by a programmer. Whatever the cause, viruses are unwanted.
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