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Code Red Worm (2001) would spread itself with the message: “Hacked By Chinese!”
MyDoom Worm (2004) scraped addresses from infected machines, then sent copies of itself to
those addresses.
Storm Worm (2007) 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.
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) and
tracks the device completely for every action.
Harms Caused by Computer Malware
Different malwares will affect your computer in different ways.
They can crash your hard disk.
They can destroy all or some of your data.
They can decrease the processing speed of the computer.
They can reduce or block the memory of the computer or hard disk.
They can stop you from restarting your computer or keep on restarting your computer.
They can send e-mails from your account without your knowledge.
How does a Computer get infected?
Computer malwares spread through several ways. Some of them are:
using infected Extenal Hard Disk/Pen drives
opening an infected e-mail attachment
downloading an infected program from Internet or External Hard Disk/Pen drives
running an infected program (which can be a game, screen saver, etc.)
through local computer networks
Pen drive e-mail Computer game
Safeguarding your Computer 15

