Worms and trojan horses may harm a computer system’s data or performance. Malware such as trojan horses and worms are sometimes confused with viruses, which are technically different: a worm can exploit security vulnerabilities to spread itself automatically to other computers through networks, while a trojan horse appears harmless but hides malicious intentions. The majority of active malware threats are usually trojans or worms rather than viruses. ![]() This malware includes computer viruses, computer worms, trojan horses, keyloggers, spyware, dishonest adware, and other malicious software. Malware, short for malicious software, is software used by attackers to disrupt your computer’s operation, gather sensitive information, or gain access to private computers. But there are other more common types of malware, including but not limited to adware and spyware programs that do not have a reproductive ability. This approach does not fool modern antivirus software, however, especially those which maintain and date cyclic redundancy checks on file changes. ![]() Some old viruses, especially on the MS-DOS platform, make sure that the “last modified” date of a host file stays the same when the file is infected by the virus. In order to avoid detection by users, some viruses employ different kinds of deception methods. ![]() ![]() By now we all know what a virus is, which is a computer program that can replicate itself and is almost always spread from one computer to another.
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