explain and write about five most popular virus attacks IT industry
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5. Nimda
Nimda was a rare combination of a worm, a virus and a Trojan horse. "NIMDA, that was a nasty one," said Richard III. "That was a Windows virus that had a lot of different methods of infection. It used email, web server exploits, all kinds of different stuff. 2001 was a great year for viruses." And how. Nimda's various distribution tactics allowed it to become the world's most widespread virus less than an hour after it was released into the wild.
4. Slammer
Richard III described Slammer as an “extremely fast-spreading computer worm that infected the majority of infectable hosts within minutes.” Slammer first hit the Internet at 5:30 AM, GMT on January 25, 2003. Ten minutes later, 75,000 computers were infected with the worm. The genius of the worm’s design related to its size, as, at only a few hundred bytes long, the whole program fit within a single UDP packet.
3. Blaster
The Blaster was not a particularly dangerous worm, due to a programming error, but it received a lot of media attention nonetheless. The worm exploited a hole in Windows XP programming, and, within its code, contained a specific attack on Bill Gates that read "billy gates why do you make this possible? Stop making money and fix your software!!" An 18-year-old named Jeffery Lee Parson was arrested and eventually sentenced to spend a year and a half in prison for writing an updated version of the Welchia.
2. Welchia
Welchia remains one of the most unusual worms in history, as it was designed to help instead of hurt. A response to the Blaster worm, Welchia infected computers, cleared out the Blaster infestation, and then deleted itself. While Richard III contends this was just a case of hacker one-upsmanship, he did say that it raised a lot of ethical questions about the use of invasive virus techniques for a positive end.
1. Commwarrior-A
Hello iPhone users; welcome to the next level of viruses. Commwarrior-A hit in the summer of 2005, and it struck in an unsuspecting place: cell phones. The first ever cell phone virus, Commwarrior-A spread through text messages, but only infected 60 cell phones. Despite the small number of infected devices, security experts see Commwarrior-A as the beginning of a new kind of virus, and worry that the spread of smart phones means Commwarrior-A was merely the first in what will become a long line of phone targeting malware.
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