The Trump administration on Thursday blamed the Russian government for a campaign of cyber attacks stretching back at least two years that targeted the U.S. power grid, marking the first time the United States has publicly accused Moscow of hacking into American energy infrastructure.
Beginning in March 2016, or possibly earlier, Russian government hackers sought to penetrate multiple U.S. critical infrastructure sectors, including energy, nuclear, commercial facilities, water, aviation and manufacturing, according to a U.S. security alert published Thursday.
The Department of Homeland Security and FBI said in the alert that a "multi-stage intrusion campaign by Russian government cyber actors" had targeted the networks of small commercial facilities "where they staged malware, conducted spear phishing, and gained remote access into energy sector networks." The alert did not name facilities or companies targeted.
The direct condemnation of Moscow represented an escalation in the Trump administration's attempts to deter Russia's aggression in cyberspace, after senior U.S. intelligence officials said in recent weeks the Kremlin believes it can launch hacking operations against the West with impunity.
It coincided with a decision Thursday by the U.S. Treasury Department to impose sanctions on 19 Russian people and five groups, including Moscow's intelligence services, for meddling in the 2016 U.S. presidential election and other malicious cyber attacks.
Russia in the past has denied it has tried to hack into other countries' infrastructure, and vowed on Thursday to retaliate for the new sanctions.