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Some of the malwares are as follows: HARMS CAUSED BY COMPUTER MALWARE
Virus: A computer virus is a program that is able to copy itself when it is run. It gets activated Different malwares will affect your computer in different ways.
each time the program or file to which it is attached is opened or executed. It is the most
common type of malware. It can spread itself by infecting other programs or files. This They can crash your hard disk.
affects the original program, causing it to no longer work properly. They can destroy all or some of your data.

Worm: A worm is similar to virus but it can copy itself and spread rapidly to any device They decrease the processing speed of the computer.
attached. A worm does not need any program to activate it. They can reduce or block the memory of the computer or hard disk.
Trojan Horse: A trojan horse is a dangerous virus. It represents itself as helpful software They stop you from restarting your computer or keep on restarting your computer.
program. Once the user clicks on it to agree to run it, it gains access to sensitive data and then They send e-mails from your account without your knowledge.
modifies, blocks, or deletes the data. It cannot copy itself from one computer to another.
Spyware: A spyware steals important information and data on the device, such as account HOW DOES A COMPUTER GET INFECTED?
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 Computer malwares spread through several ways. Some of them are:
advertisements on the screen. using infected CDs/Pen drives
opening an infected e-mail attachment

Factbot downloading an infected program from Internet, Pen drives, e-mail Computer game
CDs or DVDs
In 1986, the first virus was written for Windows based PCs by two brothers, Basit and Amjad running an infected program (which can be a game, screen
Farooq Alvi, from Pakistan, who were only 17 and 24 years old at the time. They named it “Brain”.
saver, etc.)

through local computer networks CD Pendrive
THE MOST DANGEROUS MALWARES KNOWN

Wabbit Virus (1974) makes multiple copies of itself until the system slows down and crashes. SYMPTOMS OF AN INFECTED COMPUTER
ILOVEYOU Virus (2000) worked by sending a fake “love letter” that looked like a harmless An infected computer system will:
text file. start displaying unusual messages on the screen Factbot
Code Red Worm (2001) would spread itself with the message: “Hacked By Chinese!” take time to load the programs. Fred Cohen introduced the term

Mydoom Worm (2004) scraped addresses from infected machines, then sent copies of itself take more time to shut down the Windows ‘Virus’ in 1986 that stands for "Vital
to those addresses. increase the size of the files Information Resources Under Siege."
Storm Worm (2007) attacked millions of computers with an email about approaching bad change the file names or types automatically
weather.

Zeus, also known as Zbot Trojan horse (2007) was made with an intention to steal banking HOW TO PROTECT YOUR COMPUTER
information of United States Department of Transportation.
Emotet (2014) is considered one of the most destructive and dangerous Trojans. It spreads
through spam emails to steal banking information.
Pegasus (2016) is commercial spyware. It secretly infects a smartphone (Android or iOS) Download only legal software. Don’t open any unknown e-mail.
and tracks the device completely for every action. Use the original version of Windows. Don’t open any e-mail attachment from
Scan Pen drive, CD and any other external unknown sources.

What if you could design an impenetrable cyber fortress to protect your computer storage device for viruses before opening Don’t download music, program or games
from hackers? What features would it have, and how would you use technology in computer. from unknown sources on the Internet.
to build it?

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