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Trojan horses are a type of harmful software that masquerades as a regular, benign program or utility in order to persuade a victim to install it.Worms are usually found in emails and drive-by downloads. This makes them more dangerous than a virus. However, they're able to move through the internet and copy themselves onto computers without help from a host program. Worms are a lot like viruses and can cause the same kinds of damage.They can harm computers in many different ways, like deleting files and stealing passwords.
Viruses are very common in pirated programs. They cannot copy themselves or move from one computer to another without a program to host it.
There are many different kinds of malware. Their complaints do not always stop the websites from bundling. Computer security experts complain about websites that bundle real software with malware. However, some non-piracy websites also put malware (or other unwanted programs that are almost as bad as malware) in a download with real, legal software in a process known as bundling. This is because the downloader was doing something illegal and cannot complain to the authorities without getting in trouble themselves. This is most common with pirated programs. People who write malware also get their programs onto computers by attaching them to real programs that people want. However, even current websites that people use all the time can host drive-by downloads when someone hacks the site. This kind of malware attack is usually found on websites that are not used a lot or whose security methods are very old. A user does not have to click anything for their computer to get infected from a drive-by download. When someone downloads and opens the attachment, the virus installs and uses their computer to send itself to even more people.Īnother way malware installs itself is when a victim gets malware just by going to a website with the malware hidden on it. These attachments are usually sent from other computers that already have malware on them.
One common way is through email attachments. There are a lot of ways malware can get onto someone's computer. The Chinese government probably used a virus to stop people from protesting its decisions. Experts think that the United States government made a virus named Stuxnet to stop an important place in Iran from working. World governments have written malware to hurt their enemies. Malicious keystroke logging software remembers everything a user types in and gives it to the malware author to read. Another virus, CIH, tries to make it so the victim can never use their files or turn on their computer again. The Cryptolocker computer virus, for example, makes it so a person cannot use their own computer until they pay the malware writers for a software key to unlock it. The main reason people write malware is to hurt others and make money, usually by stealing or deleting important information. Experts think that 31.5% of the world's computers have some type of malware installed. The number of malware programs on the Internet has grown very quickly ever since then the late 1990s and is still growing today. So, more programmers started writing malware. People saw that they could use malware to get useful information now, like passwords and credit card information. Computers were getting more complex and faster. More people started using the computers in the late 1990s and early 2000s. In fact, malware was so rare that the word "malware" was not coined until 1990. Even the most common piece of malware from this time did not do damage to people's computers. Instead, people wrote malware for fun or just to show that they could. They did not have any interesting information for malware to take. People first started writing malware in the 1970s and early 1980s.
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