The hacker, who sold data in the dark Web marketplace for the equivalent of $ 20,000 in digital currency Bitcoin, stole data last year from several official websites, some of which have already been detected, such as more than 151 million records from “MyFitnessPal” and 25 million records from “Animoto” website. But many of the other hacked sites listed on the dark Web did not know or did not reveal the hack, such as 500px and Coffe Meets Bagel webstes.