A virus is a small piece of software that piggybacks on real programs. For example, a virus might attach itself to a program such as a spreadsheet program. Each time the spreadsheet program runs, the virus runs, too, and it has the chance to reproduce or wreak havoc.
Here is a top 10 viruses and malware list you are facing in some places on using internet or computer.
1. Creeper:
Creeper virus is a computer virus that is most commonly recognized as the first computer virus. In 1971, Bob Thomas at BBN created Creeper as an experimental self-duplicating program that was intended not to inflict damage on, but to illustrate a mobile application. The Creeper searched for a machine on the network, shifted to it, and displayed a message on the system “I’m the creeper, catch me if you can!” and started over, thereby hopping from system to system.
2: Code Red
Code Red was a computer worm observed on the Internet on July 13, 2001. It attacked computers running Microsoft's IIS web server.Within a week's span, around 400,000 servers were infected with their homepagesaying 'Hacked By Chinese.
3: Morris worm
The Morris worm or Internet worm of November 2, 1988 was one of the first computer worms distributed via the Internet.Chris Larsen, Malware Lab Architect for Blue Coat Systems, points to the Morris worm, created in 1988 by Cornell University student Robert Tappan Morris, as the first internet worm.
4: Anna Kournikova
The Anna Kournikova virus spreaded like wildfire which distributed emails promising a compromising picture of the tennis star. This proved how sex sells social engineering.
5: Flame malware
Flame,also known as Flamer, sKyWIper,and Skywiper,is modular computer malware discovered in 2012 that attacks computers running the Microsoft Windows operating system.The program is being used for targeted cyber espionage in Middle Eastern countries.
6: SQLslammer
SQL Slammer is a computer worm that caused a denial of service on some Internet hosts and dramatically slowed down general Internet traffic, starting at 05:30 UTC on January 25, 2003.
It infected almost 75,000 victims within ten minutes. The basis of the worm was demonstrated at the Black Hat Briefings by David Litchfield.
7: Flashback
Trojan BackDoor.Flashback, commonly referred to as the Flashback Trojan, is a Trojan horse affecting personal computer systems running Mac OS X.The first variant of Flashback was discovered by antivirus company Intego in September 2011.
8: Koobface
Koobface is a multi-platform computer worm that originally targeted users of the networking websites like Facebook, Skype, Yahoo Messenger and email websites such as Google Mail, Yahoo Mail, and AOL Mail.), MySpace,hi5, Bebo, Friendster and Twitter.In the later versions it has stopped using those website because they improved their protection. Koobface is designed to infect Microsoft Windows and Mac OS X, but also can infect Linux.
9: Storm botnet
The Storm botnet or Storm worm botnet is a remotely controlled network of "zombie" computers (or "botnet") that have been linked by the Storm Worm, a Trojan horse spread through e-mail spam. At its height in September 2007, the Storm botnet was running on anywhere from 1 million to 50 million computer systems,and accounted for 8% of all malware on Microsoft Windows computers.It was first identified around January 2007, having been distributed by email with subjects such as "230 dead as storm batters Europe," giving it its well-known name. The botnet began to decline in late 2007, and by mid-2008, had been reduced to infecting about 85,000 computers, far less than it had infected a year earlier.
10: Ikee
First Worm written in C by ikee for iPhone.This worm exploits the fact that most jailbroken iPhone/iPod touch users install SSH and also neglected to change the password for root / mobile (which is "alpine" by default). Once a device is infected, it disables the SSH service and then attempts to infect more devices.
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