Mariya "Masha" Prusakova (born 25 December 1989) is a Russian snowboarder. She competed in the women's halfpipe event at the 2006 Winter Olympics.
Prusakova met American financier and child sex offender Jeffrey Epstein in 2011. She recruited women into Epstein's trafficking network, calling herself "Paris based Ghislaine Maxwell" in a 2013 email to Epstein. Epstein financed some of Prusakova's Master of Law degree from the University of California, Berkeley.
In 2018, she co-founded Crypto PR Lab, a pro-cryptocurrency public relations firm.