BOSON SPIDER is a cyber criminal group, which was first identified in 2015, recently and inexplicably went dark in the spring of 2016, appears to be a tightly knit group operating out of Eastern Europe. They have used a variety of distribution mechanisms such as the infamous (and now defunct) angler exploit kit, and obfuscated JavaScript to reduce the detection by antivirus solutions.
References
Actor metadata imported from Malpedia (Fraunhofer FKIE).