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    Worm

                     A worm is similar to virus but it can copy itself and spread rapidly to any device attached. A
                     worm does not need any program to activate it.

                     Trojan Horse

                     A trojan horse is a dangerous virus. It represents itself as helpful software program. Once the
                     user clicks on it and agree to run it, it gains access to sensitive data and then modifies, blocks,
                     or deletes the data. It cannot copy itself from one computer to another.

                     Spyware

                     A spyware steals important information and data on your device, such as account passwords
                     or bank details. It observes the user's activity without their knowledge.

                     Adware

                     An adware tracks user's browser and download history and keeps popping advertisements on
                     the screen.

                                Factbot

                        In 1986, the first virus was written for Windows based PCs by two brothers, Basit and Amjad
                        Farooq Alvi, from Pakistan, who were only 17 and 24 years old at the time. They named it “Brain”.

                          THE MOST DANGEROUS MALWARES KNOWN

                       Wabbit Virus (1974) can adversly affect computer system by making multiple copies of itself
                       until the system slows down and crashes.
                       ILOVEYOU  Virus (2000)  sometimes referred to as the Love Bug  or Loveletter, worked

                       by sending a fake “love letter” that looked like a harmless text file. It is one of the most
                       widespread viruses ever created that infected over 10 million Windows computers.
                       Code Red Worm (2001) would spread itself with the message: “Hacked By Chinese!” It caused

                       billions of dollars of damage.
                       Mydoom Worm (2004) spread by email attachments and infected websites, and is classified

                       as a mass-mailing worm. Mydoom can cause a number of problems on an infected computer,
                       including deleting files, stealing information, and causing the system to crash.
                       Storm Worm (2007) is a trojan horse that is so dangerous that it has the capacity to infect
                       many operating systems. It attacked millions of computers with an email about approaching

                       bad weather.
                       Zeus, also known as Zbot Trojan horse (2007) was made with an intention to steal banking

                       information of United States Department of Transportation.

                                                                                            #Safeguarding Your Computer  89

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