On this day in 1988, the Morris worm infected 10% of the Internet within 24 hours — worm slithered out and sparked a new era in cybersecurity

https://www.tomshardware.com/tech-industry/cyber-security/on-this-day-in-1988-the-morris-worm-slithered-out-and-sparked-a-new-era-in-cybersecurity-10-percent-of-the-internet-was-infected-within-24-hours