Melissa (1999): An early email virus, Melissa, propagated via Microsoft Word documents and brought major mail server crashes.ILOVEYOU (2000): Pretending to be a love letter, this worm duped millions and wrought $10 billion in worldwide damages within weeks.Mydoom (2004): The fastest email worm to date, Mydoom crippled search engines and overloaded servers on the internet.Stuxnet (2010): This sophisticated cyberweapon attacked Iran's nuclear program in secret, signaling a new age of cyberwarfare.WannaCry (2017): Ransomware, which had locked users out of their data, WannaCry spread to more than 150 nations, disabling hospitals and companies.Read More Stories.Join our WhatsApp Channel to get the latest news, exclusives and videos on WhatsApp