"Over the course of a few days in February 2000, a lone hacker was able to bring some of the Web’s larger sites to their knees, using just a few dozen machines and some relatively primitive software to cripple Yahoo, eBay, E*trade, Amazon, ZDnet and others for hours at a time. No one knew it at the time, but these attacks would come to be seen in later years as some of the earlier outbreaks of what has become a massive online pandemic.
The attacks themselves were nothing fancy. The hacker, who would later be identified as a 15-year-old boy from Montreal named Michael Calce, used a DDoS tool called Mstream to instruct a small army of machines he had previously compromised to send huge amounts of junk data at the remote Web servers he was targeting. But the technique was brutally effective: Yahoo, then the dominant search provider and portal site, was knocked offline for about two hours after receiving more than a gigabit of data per second from Calce’s bots. " – Content courtesy of The Root of the Botnet Epidemic | threatpost