U.S. military hackers have penetrated Russia's electric grid, telecommunications networks and the Kremlin's command systems, making them vulnerable to attack by secret American cyber weapons should the U.S. deem it necessary, according to a senior intelligence official and top-secret documents reviewed by NBC News.
U.S. officials continue to express concern that Russia will use its cyber capabilities to try to disrupt next week's presidential election. U.S. intelligence officials do not expect Russia to attack critical infrastructure — which many believe would be an act of war — but they do anticipate so-called cyber mischief, including the possible release of fake documents and the proliferation of bogus social media accounts designed to spread misinformation.
On Friday the hacker known as "Guccifer 2.0" — which U.S. officials say is a front for Russian intelligence — tweeted a threat to monitor the U.S. elections "from inside the system."
Just another data point that will help Tuesday's vote remain tranquil.