New evidence collected by investigators suggests that hackers that attacked DNC penetrated deeper than previously thought. CrowdStrikes incident response time discovered not one, but two hacking groups that it considers some of the best adversaries out of the all the numerous nation-state groups the company encounters daily COZY BEAR and FANCy BEAR. The investigation conducted by the security firm CrowdStrike suggests that Russian government was behind the espionage campaign. The case demonstrates the potential influence of hackers on the politic of one of the most important governments of the world.”]
Source: https://securityaffairs.co/wordpress/49705/intelligence/dnc-hack.html