The Department of Homeland Security (DHS) is warning of potential Russian cyberthreats to U.S. organizations at all levels as Russia–Ukraine tensions continue to intensify. The federal agency issued a “SHIELDS UP” advisory stating that the Russian government understands that disabling or destroying critical infrastructure—including power and communications—can “augment pressure on a country’s government, military, and population and accelerate their acceding to Russian objectives.” “The Russian government has used cyber as a key component of their force projection over the last decade, including previously in Ukraine in the 2015 timeframe,” DHS’s Cybersecurity and Infrastructure Security Agency stated. Anne Neuberger, deputy national security adviser for cyber and emerging technology, told a press briefing at the White House last week that the Biden administration is preparing for “potential geopolitical contingencies.” DHS Secretary Alejandro Mayorkas said on Feb. 22 that U.S. organizations must be prepared for potential ransomware attacks. “We have no information to suggest …