Early this year, DDoS attack size has doubled as a new attack method is being employed. This is called the DDoS reflection and amplification method. This method has the potential to multiply their attack resources by a factor of 500K.
With reflection DDoS attacks such as Memcached, attackers do not need malware to infect and control bots in a botnet. Even unsophisticated attackers can launch an attack. Akamai has observed an increase in scanning to identify vulnerable Memcached servers.