While analyzing the Flame malware that we detected in May 2012, Kaspersky Lab experts identified some distinguishing features of Flame's modules. Based on those features, we discovered that in 2009, the first variant of the Stuxnet worm included a module that was created based on the Flame platform. This indicates that there was some form of collaboration between the groups that developed the Flame and Tilded (Stuxnet/Duqu) platforms.