Not to mention that the hackers "accidentally" left metadata in the emails that refers to Felix Dzerzhinsky, the founder of the Cheka, the precursor to the KGB.

Not to mention that the hackers "accidentally" left metadata in the emails that refers to Felix Dzerzhinsky, the founder of the Cheka, the precursor to the KGB. That's either the sloppiest intelligence operation ever, or an easter egg meant to distract.