: An advanced Trojan horse used to steal banking information, reportedly affecting 88% of Fortune 500 companies.

: A tiny but powerful worm that slowed the entire internet to a crawl in just minutes by targeting SQL servers.

While "AZMATH" appears to be a specific niche or community-driven list, the consensus across major tech resources like HP Tech Takes and Britannica highlights a consistent group of notorious digital threats. These viruses and worms are ranked by their financial impact, speed of infection, and sheer destructive capability. The Top 10 Most Notorious PC Viruses

: A fast-spreading worm that caused roughly $30 billion in damage by overloading corporate servers with millions of emails.

: A sophisticated worm that created a massive botnet of millions of infected Windows computers, targeting government and business servers.