A massive distributed Denial-of-Service (DDoS) attack on Dyn could ‘easily’ have been prevented. The attack was most likely carried out not by a hostile nation state or sophisticated cyber criminals looking to extort money from large websites, but by script kiddies who used the Mirai malware source code after finding it posted publicly on the website Hackforums.com. Security experts have warned that an attack surface that broad and vulnerable would prove irresistible to criminal hackers.”]
Source: https://www.csoonline.com/article/3137544/ddos-attack-on-dyn-could-have-been-prevented.html