![]() ![]() The takeaway: be careful when opening strange attachments in a love letter, even if it comes from your love interest. The sudden rush caused by this “love” bug caused the Pentagon, the British Government, and the CIA to completely shut down their mail systems. ILOVEYOU infected over ten million Windows PCs. The worm also sent copies of itself to all contacts in the user’s address book. Clicking on it activated a Visual Basic script (a programming language which allows programmers to modify code), and the worm started overwriting random files on the user’s PC. The malware was hidden in the attachment called “ ”. The virus used emails as a transmission channel, disguising itself as a love letter from one of its victim’s contacts. Romantic as it sounds, the ILOVEYOU virus is not the kind of a gift you’d want to receive on Valentine’s Day. The latter helped it spread rapidly and caused huge network outages. ![]() Though its main target is believed to be internet Servers running Windows NT and 2000, Nimda also affected regular users’ PCs running Windows. No wonder, since the worm used five different transmission routes. Within an hour after its release, Nimda reached the top spot of all reported attacks. But it’s actually a computer virus known as Nimda (admin spelled backwards) that hit the internet back in 2001. NimdaĪ worm, a virus, and a Trojan horse all in one sounds like something out of a horror movie. It’s believed that Morris Worm infected around 6,000 major Unix machines, causing up to ten million US dollars of damage. Finally, it caused crashes and made the computer completely useless. ![]() 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. 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. 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. Here are the top ten notorious computer viruses of all time. Hackers don’t need to reinvent the wheel every time and use best practices from their successful counterparts. Download Clario and start your free 7-day trial today. AV test has proven Clario’s detection rate to be close to 100%, so you can rely on its real-time anti-malware protection to keep your device safe. One of the best sources to check is the AV test. Pro tip: While choosing an antivirus, always compare the virus detection rate different apps provide. But knowing the most destructive and tricky computer viruses in history can help you avoid them. Even when you’re armored with antivirus software, there is still a chance your system and personal data may be corrupted. While you’re reading this, 970 million pieces of malware are circulating the web, ready to pounce. The internet is filled with various types of viruses. From viruses disguised as love letters, to worm battles, here’s everything you need to know about the world’s most famous computer viruses, where and how they can be caught, and how to avoid them. ![]()
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