Sunday, May 8, 2016

Top Five Most-Destructive Computer Viruses

We all are familiar with the pain of computer viruses. It attaches itself to a program or file, enabling it to spread from one computer to another, leaving infections as it travels. Almost all viruses are attached to an executable file, which means the virus may exist on your computer, but it actually cannot infect your computer unless you run or open the malicious program. These viruses can affect your computer in a very bad way as it can slow down the performance, might corrupt your system files, make some programs faulty or corrupt or just damage your boot sector creating problems when you boot into the windows. Computer viruses have flooded the computer user for a long time now. Here are five most dangerous and Worst Viruses For the Computers.

1) Stuxnet (2009-2010) The arrival of Stuxnet was like a cartoon villain come to life: it was the first computer virus designed specifically to cause damage in the real, as opposed to virtual, world. While previous malware programs may have caused secondary physical problems, Stuxnet was unique in that it targeted software that controls industrial systems. Specifically, Stuxnet was designed to damage machinery at Iran’s uranium enrichment facility in Natanz. Based on the available information, including data from the International Atomic Energy Agency, experts believe Stuxnet caused a large number of Iran’s centrifuges—essentially giant washing machines used to enrich uranium—to spin out of control and self-destruct. Though Stuxnet was discovered in 2010, it is believed to have first infected computers in Iran in 2009.

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2) Zeus (2007) There is no shortage of malware kits that target personal information, but Zeus has become the go-to tool for many of today’s cyber criminals and is readily available for sale in the cyber crime underworld. It can be used to pilfer passwords as well as files, helping to create a literal underground economy for compromised identities that can be bought and sold for as little 50 cents. In the age of Internet banking and online shopping, a compromised identity is much more than just a name and social security number: it’s your address, date of birth, mother’s maiden name, and even your secret security questions (your first pet, your favorite teacher, or your best friend from grade school).
3) Melissa It was the first mass-mailing macro virus of e-mailing which became the breaking news across the world on March 26, 1999. It came with an attachment with an email with the subject line “Important Message from ]the name of someone[,” and body text that reads “Here is that document you asked for…don’t show anyone else wink emoticon”. The attachment is often named LIST.DOC. which when opened, disables a number of safeguards in Word 97 or Word 2000, and, if the user has the Microsoft Outlook e-mail program, causes the virus to be resent to the first 50 people in each of the user’s address books.
4) MY Doom My Doom was introduced to the computer on 26th January 2004 and this malware sent a Shockwave around the world as it scattered exponentially via e-mail with random senders’ addresses and subject lines. It was also known as “Novarg” is reported to be the most dangerous virus ever released. It destroyed the cyber world with one message on email which reads “Mail Transaction Failed.” But, as soon as the message is clicked upon, the attachment is executed and the worm is transferred to email addresses found in the user’s address book. This activated a tremendous denial of service attack that infected close to about two million PCs.
5) Code Red It broke down the cyber world on July 13, 2001. It was a very sneaky virus which took advantage of a flaw in Microsoft Internet Information Server. Unlike the other viruses, this one did not require you to open an e-mail attachment or run a file instead all what a Code Red required was an active Internet connection with which it ruined the Web page that you opened by displaying a text “Hacked by Chinese!”

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