Since the first major protests in Kiev that triggered the current crisis with Moscow, American intelligence agencies have been on high alert for cyberattacks aimed at the new government in Ukraine. They were a bit late: the attacks started long before President Viktor F. Yanukovych was forced from office, and as might be expected, no one can quite pinpoint who is behind them, although some suspicion is falling on Russia.According to a report published by the British-based defense and security company BAE Systems, dozens of computer networks in Ukraine have been infected for years by a cyberespionage “tool kit” called Snake, which seems similar to a system that several years ago plagued the Pentagon, where it attacked classified systems.
http://www.nytimes.com/2014/03/09/world/europe/suspicion-falls-on-russia-as-snake-cyberattacks-target-ukraines-government.html