Additional research and support provided by Chad Seaman. \r\n Introduction \r\n Members of Akamai's Security Intelligence Response Team have been investigating a new DDoS vector that leverages a UDP Amplification technique known as WS-Discovery (WSD). The situation surrounding WSD was  recently made public , but multiple threat actors have begun to leverage this DDoS method to ramp up their attacks. \r\n While conducting exploratory research prior to WSD becoming public, the Akamai SIRT gained first-hand knowledge into the inner workings of a WSD attack after one of our customers came under fire. The attack, which targeted the gaming industry, weighed in at 35/Gbps at peak bandwidth. \r\n Additional research into WSD protocol implementations on devices across the Internet raised grave concerns, since the SIRT was able to achieve amplification rates of up to 15,300% of the original byte size.…