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Malware, short for malicious software, is software designed to secretly use a computer system without the owner's informed consent. Malware is a software, its job is to damage a computer system such as computer virus. Malware's include arrange of harmful programs such as computer viruses, worms, Trojans, rootkits and sometimes adware. Malware, also known as "Trojan horse" is a malicious program that is designed to plant programs on your computer without the owner's knowledge that will lead to certain results. For example, malware can join the software such as Microsoft Word or Power Point and set the boot sequence in the game, which allows a hacker to do things like cause a CD to open on its own or to play music files in the middle of the night. Malicious programs may have more sinister purposes. For example, it can install a program that allows a hacker to listen to conversations around the computer, even if the computer microphone is turned off, or it can record user keystrokes to transmit information back to the hacker(Stall, 1989).


As malware attacks become more frequent, attention began to shift from viruses and spyware protection, malware protection, and programs were developed specifically to deal with them.

Software is considered malware based on the perceived intent of the creator rather than any features. Malware includes computer viruses, worms, Trojan horses, spyware, adware, dishonest, scareware, criminal, most rootkits and other malicious and unwanted software or program. By law, malware is sometimes called computer contamination, for example, in criminal codes of a number of U.S. states, including California and West Virginia(Shimomura, 1996).

The prevalence of malicious software tool for organized crime internet, along with the general failure of traditional anti-malware platforms (products) to protect against a continuous flow of unique and newly produced malicious programs, saw the adoption of new thinking for business works on the Internet: the recognition that some significant percentage of Internet customers will always be infected for one reason or another, and that they should continue to do business with infected clients. As a result, a greater emphasis on back-office systems designed to spot fraudulent activity related to the advanced operating malware on client computers(Shimomura, 1996).

Malware is not the same as defective software, ie software that has a legitimate purpose but contains harmful bugs. Sometimes, malware under the guise of genuine software, and can come from the official site. Therefore, some security software such as McAfee can be called malware "potentially unwanted programs" or "PNP". Although a computer virus is a malicious program that can reproduce itself, the term is often used incorrectly to refer to an entire category. Malware is sometimes referred to as malware(Prosise, 2001).

The other for non-commercial category of malware has arisen in spyware - programs designed to monitor the user's Web browser, display unsolicited advertisements, or redirect affiliate marketing revenues for the spyware creator. Spyware does not spread like viruses, they are generally established using a security hole, or bundled with user-installed software, such as peer ...
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