The US ramped up its sanctions against Iran on Tuesday, designating four people and two companies it says were “involved in malicious cyber activity” on behalf of the country’s military. “These actors targeted more than a dozen US companies and government entities through cyber operations, including spear phishing and malware attacks,” the US Treasury Department said in a statement. The individuals and companies were working “on behalf of” Iran’s Islamic Revolutionary Guard Corps Cyber Electronic Command (IRGC-CEC), the Treasury said. “Iranian malicious cyber actors continue to target US compa…