February 13, 2021

Most Dangerous Computer Viruses In The World

Types Of Most Dangerous Computer Viruses Happened In The World.

Many of us at some point have found that our computer had started acting weirdly. Computer viruses basically act like viruses and Replicate.  They infect lots of files on a computer and also spread to another computer. There are viruses like Worms, Adware, Trojans, and Rootkits which are hard to detect and can give attackers control of the machine. Perhaps even more frightening viruses are ransomware attacks, where someone gets a hold of the data and sometimes sensitive data that makes you pay to get it back. 



Some of the Computer viruses are:-

1) SQL slammer/sapphire 

This caused havoc in the USA in 2003. It cost about 1 billion dollars. It affected the web servers which eventually lead to the bank's ATM crashing. It messed with continental airlines, electronic ticketing and it blocked 27 million people from the internet even Seattle's 911 services were affected as Wired explains slammer used an attack on kind of software, but then the infected computers spread this worm through the internet. It infected around 75,000 servers in just 10 minutes. It was then stopped by patches and antivirus software. But the creator of this virus was still not known. 

 2) Melissa 

This virus was named after an exotic dancer. It began as an infected word document posted on an alt.sex Usenet group and if that was opened it would send itself to 50 people on some other person's Microsoft Outlook email program. That might not sound too bad. But it created mayhem when emails were being sent at a rate that messed with companies and big corporations so much so that in 1999 Microsoft shut down incoming. According to a source email users would get a message as 'Here is that document you asked for and don't show it to anyone else'. There was also an attachment with it. And it cost  the governments, people, and companies  all about 1.2 billion dollars. Then Savvy, the creator of the virus, was caught and was sentenced to prison for 10 years. 

3) Anna Kournikova 

This virus was created by a young  20-year-old Dutch guy named Jan DeWit. He used the good-looking tennis player, Anna Kournikova as bait where you basically would receive an email saying 'you had a photo of her' but if you clicked that file then it creates a viral visual basic script that means everyone in the address book will be forwarded the same thing and this affected millions of people which eventually overloaded the servers all over the world. This gave the young DeWit afraid as he didn't think it would cause so much of a problem. According to a source the time he understood what the worm did he had conferred with his parents and decided to turn himself into the police. He was lucky and got away with 150 hours of community service. The virus was even in an episode of a sitcom named Friends.

4) Sir camp

 This worm also made Microsoft Windows systems its target again. It spread far and wide as it sent itself to people in the email address book. Usually but not always you saw the following message 'I send you this file to have your advice', what was clever about this virus is that it would randomly choose files from the computer and send them to others. This was not good for governments as they didn't want random files to be sent out. It affected  11% of computers in Europe and 12% of computers in North America. CNET wrote that it cost 1 billion dollars in damages, related to lost productivity and cleaning infected systems. It also caused some blushes. No one was ever arrested for creating this virus. 

5) Code Red 

These estimates on the damage caused by Code Red range in the billions of Webpages that were affected and suddenly got the message 'Welcome to worm comm hacked by Chinese Norian'. This malicious code is not saved as a file but is inserted into and then run directly from memory. It has been called one of the most sophisticated attacks ever that almost brought down the internet infecting. Many websites run on Microsoft Internet Information Server so what it's called a distributed denial-of-service attack which means websites get overwhelmed with too much traffic that brings them down. According to Scientific American, it might not have been China who was the culprit though. Many investigations were made but no one knew where it came from.

6) Configure 

The costly infections Configure is said to be the most destructive worm of all and it cost those infected around nine billion dollars. This was discovered in 2008 and infected around fifteen million computers. It affected police departments in the UK as well as the military and messed with their operations. It infected Windows operating systems for a long time as it kept getting past antivirus software and patches. It was a mystery for security experts too, but they knew a machine infects other machines in the network. 

7) I love you 

This virus comes as an email with the words 'I love you' in the subject line. This may look nice as so many businesses use outlook. It's spread fast because people open that attachment file and once they did that everyone else in that address book got the same email and apart from that it also deleted many of the files including JPEG and mp3. It reached around 45 million people in just a day. It became so huge that in 2000, Ford Motor Company shut down its email. It was almost the same as Melissa, but over here it sent a mail to all of your contacts and then deleted personal files too. Pentagon CIA and the British Parliament also shut down their emails. The virus was eventually linked to some young programmers in the Philippines and the cost of this virus was around fifteen billion dollars.

Aforesaid are some of the dangerous computer viruses that occurred around the world.


Trini Thomas

Author & Editor

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