The Iranian police arrested 27-year-old Mohammad Yousefi, a former Green Movement activist, after using what it called a "Black Spider" program, which combed Facebook for content that contradicts regime values. Yousefi was previously incarcerated in Evin Prison following the post-election riots in 2009, and is only one of several defendants mentioned in the Cyber Police report that mentioned the Black Spider program.
Source: Hackread.com, March 9, 2015.