Online attackers briefly disrupted service on at least two of the 13 “root” servers that are used to direct traffic on the Internet. The attack appeared to have been launched by a group of compromised PCs, called a botnet. Root servers manage the Internets Domain Name System (DNS), used to translate Web addresses such as Amazon.com into the numerical IP addresses used by machines. By 10:30 a.m., ISPs were able to filter enough traffic from the botnet machines that traffic to and from the root servers was essentially back to normal.”]
Source: https://www.csoonline.com/article/2121767/botnet-attack-targets-root-servers.html