Turnkey exploit kits -- built in with malware infection mechanisms and distribution channels, command and control infrastructure, and everything a cybercriminal would need to attack users for the sake of data theft and other nefarious purposes -- have long been the bane of the cybersecurity landscape.
These kits put cutting-edge technical capabilities at the fingertips of crooks with very little geek cred but open pocketbooks, broadening the possibilities of wide-scale infection for profit.
On the good-news front, exploit kits have seen a massive slowdown in 2016. However, on the not-so-good-news front, many researchers believe that it is only a matter of time before the criminals pick up the pace again.