Iran’s railroad system came under cyberattack Friday, a semi-official news agency reported, with hackers posting fake messages about train delays or cancellations on display boards at stations across the country.  The hackers posted messages such as “long delayed because of cyberattack” or “canceled” on the boards. They also urged passengers to call for information, listing the phone number of the office of the country’s supreme leader, Ayatollah Ali Khamenei.  The semiofficial Fars news agency reported that the hack led to “unprecedented chaos” at rail stations.  No group took responsibility. Earlier …

U.S. President Joe Biden said he discussed recent ransomware attacks on the U.S. from Russia in a phone call Friday with Russian President Vladimir Putin.Biden said he told Putin, “I made it very clear to him that the United States expects when a ransomware operation is coming from his soil, even though it’s not sponsored by the state, we expect them to act if we give them enough information to act on who that is.”He told reporters at a White House signing ceremony Friday that the call “went well. I’m …