On Nov 1, 2017, Mattijs Jonker has presented his paper “Millions of Targets Under Attack: a Macroscopic Characterization of the DoS Ecosystem” at the ACM Internet Measurement Conference (IMC 2017).
This research was covered by various news outlets, including The Register and Tweakers.net (Dutch):
https://tweakers.net/nieuws/131497/langdurig-ddos-onderzoek-wijst-op-30000-aanvallen-per-dag.html
https://www.sdsc.edu/News%20Items/PR20171101_caida_dos.html
http://ucsdnews.ucsd.edu/pressrelease/a_third_of_the_internet_is_under_attack
Paper details:
"Millions of Targets Under Attack: a Macroscopic Characterization of the DoS Ecosystem"
Mattijs Jonker (University of Twente), Alistair King (CAIDA, UC San Diego), Johannes Krupp and Christian Rossow (CISPA, Saarland University), Anna Sperotto (University of Twente), Alberto Dainotti (CAIDA, UC San Diego)
https://conferences.sigcomm.org/imc/2017/papers/imc17-103.pdf