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The Australian, US, and UK governments announced sanctions against Aleksandr Gennadievich Ermakov, a Russian national believed to be responsible for the 2022 Medibank hack and a member of the REvil ransomware group.
Australia sanctioned Ermakov for utilizing ransomware to attack the Medibank network and for the exfiltration of sensitive data of 9.7 million users of Medibank services. Today, the United States and the United Kingdom, in solidarity with Australia, are taking action against the same individual because of the similar risk presented by this actor to the United States and the UK.