: Notorious for spoofing sender addresses, making it appear as though the virus came from a trusted contact.
: A worm that exploited a vulnerability in Microsoft IIS web servers to launch DDoS attacks, including one targeting the White House website. The Top 10 Worst PC Viruses of All Time – AZMATH
: A massive ransomware attack that encrypted files and demanded Bitcoin payments, famously crippling the UK's National Health Service. : Notorious for spoofing sender addresses, making it