Minutes after President Joe Biden announced new sanctions on Russian banks and elites on Tuesday, a senior FBI cyber official asked US businesses and local governments to be mindful of the potential for ransomware attacks as the crisis between the Kremlin and Ukraine deepens.

Russia is a “permissive operating environment” for cybercriminals – one that “is not going to get any smaller” as Russia’s confrontation with the West over Ukraine continues and further sanctions are announced, the FBI’s David Ring said on a phone briefing with private executives and state and local officials, according to two people who were on the call.

Ring asked state and