(dWrite any five well known viruses? of computer
Answers
Explanation:
Conficker, Downup, Downadup, Kido - these are all computer virus names that appeared on the internet in 2008.
Morris Worm
Let us start our journey with Morris Worm or the “Great Worm”, which is believed to be the pioneer among computer worms distributed through the internet. Created to highlight security flaws in Unix systems, its founder Robert Morris, made a fatal error that transformed the worm from a potentially harmless software to a denial-of-service (DDoS) attack machine.
The worm was supposed to ask whether there was already a copy running on the computer but instead it just continuously made copies of itself, slowing the system down. Finally, it caused crashes and made the computer completely useless.
It’s believed that Morris Worm infected around 6,000 major Unix machines, causing up to ten million US dollars of damage.
Nimda
A worm, a virus, and a Trojan horse all in one sounds like something out of a horror movie. But it’s actually a computer virus known as Nimda (admin spelled backwards) that hit the internet back in 2001. Within an hour after its release, Nimda reached the top spot of all reported attacks. No wonder, since the worm used five different transmission routes.
Though its main target is believed to be internet Servers running Windows NT and 2000, Nimda also affected regular users’ PCs running Windows. The latter helped it spread rapidly and caused huge network outages.
SQL Slammer
Outages in 911 service in Seattle, the crash of the Bank of America’s ATM service, and cancellation of several Continental Airlines flights - these are just a few examples of what SQL Slammer (or simply Slammer) is capable of. It sparked at 05:30 UTC on January 25, 2003, infecting its first server. Once the job was done, Slammer spread rapidly, doubling the number of victims every few seconds, and just ten minutes after it was released in the wild, the number of infected computers grew to 75,000.
Slammer dramatically slowed down worldwide internet traffic, brought down several important systems, caused a huge panic and more than one billion dollars of damage.
The funny thing is, this cybersecurity breach could have easily been prevented. The worm exploited a bug in Microsoft's SQL Server. Yet, the patch preventing it had been released six months before the attack, but many organizations ignored or hadn’t applied it in time.
Stuxnet
The destructive power of computer viruses can make them weapons of mass digital destruction, and Stuxnet became the first one. Unlike any other virus or malware of that time, Stuxnet was developed by the US and Israeli government engineers to disrupt Iran’s nuclear program. Spread via a USB thumb drive, it targeted Siemens industrial control systems, causing centrifuges to mysteriously fail and self-destroy at a record rate.
It’s believed that Stuxnet infected over 200,000 computers and ruined one-fifth of Iran’s nuclear centrifuges. The engineers did a remarkable job. They took great care to hit only designated targets, causing no harm to the computers that didn’t meet the required configurations.
In 2010, the year it appeared, Stuxnet was believed to be the most sophisticated cyberweapon ever deployed. It successfully completed its mission and set back Iran’s progress in building nuclear weapons by a couple of years.
Stuxnet
The destructive power of computer viruses can make them weapons of mass digital destruction, and Stuxnet became the first one. Unlike any other virus or malware of that time, Stuxnet was developed by the US and Israeli government engineers to disrupt Iran’s nuclear program. Spread via a USB thumb drive, it targeted Siemens industrial control systems, causing centrifuges to mysteriously fail and self-destroy at a record rate.
It’s believed that Stuxnet infected over 200,000 computers and ruined one-fifth of Iran’s nuclear centrifuges. The engineers did a remarkable job. They took great care to hit only designated targets, causing no harm to the computers that didn’t meet the required configurations.
In 2010, the year it appeared, Stuxnet was believed to be the most sophisticated cyberweapon ever deployed. It successfully completed its mission and set back Iran’s progress in building nuclear weapons by a couple of years
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