Los Angeles: A hack attack into Sony Pictures' systems has led to several of their unreleased films leaking online.

Several DVD screener copies of new Sony movies such as 'Annie', Brad Pitt starrer 'Fury', 'Still Alice', 'Mr Turner' are among the pirated Sony titles that have seen brisk illegal download since the Monday hack by a group calling itself Guardians of Peace, according to Torrent Freak.