After years of research and investigation into the cyber-espionage attacks that began with the discovery of Stuxnet and continued with Flame, Duqu and Gauss. While researchers have a pretty good handle on many of the tools capabilities, experts say that there may be other modules from these weapons still in circulation that have yet to be discovered. Researchers believe that many of these recent attacks are connected, whether through code re-use, similar targets or other factors, and think that several of them may have been the work of the same team.
Source: https://threatpost.com/more-flame-modules-could-be-lurking-111612/77223/