from Securelist - Information about Viruses, Hackers and Spam
In the third quarter of 2015 botnet-assisted DDoS attacks targeted victims in 79 countries around the world; 91.6% of targeted resources were located in 10 countries. The largest numbers of DDoS attacks targeted victims in China, the US and South Korea. The longest DDoS attack in Q3 2015 lasted for 320 hours.