The East (2013) by Zal Batmanglij.
The latest movie of Zal Batmanglij is a shocking story of an anarchist group and a young operative of a private intelligence firm who tries to identify the group members by spying on them.
The film of Batmanglij premiered at the Sundance Film Festival in 2013.
Cast: Brit Marling, Alexander Skarsgard, Ellen Page, Patricia Clarkson
Source: www.imdb.com