Aussie cyber sleuths have unmasked the Russian cybercriminal responsible for the massive 2022 Medibank hack that saw the sensitive data of 10 million customers stolen. Aleksandr Ermakov – believed to be part of the Russian ransomware gang REvil – was the mastermind behind the hack, officials say. He is now banned from setting foot in Australia and faces financial sanctions under new laws that are being used for the first time. Defence Minister Richard Marles says by naming him, they’ve made it difficult for Ermakov to travel anywhere in the world and enjoy the spoils of his crimes. And while we’re talking about cyber stuff, a robocall is doing the rounds in the US featuring a fake President Joe Biden. The voice has been generated using artificial intelligence, and experts say it should serve as a wake-up call ahead of the 2024 US election.