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The U.S. government sanctioned a Russian national for allegedly playing a “pivotal role” in the ransomware attack against Australian health insurance giant Medibank that exposed the sensitive information of almost 10 million patients. The breach is believed to have impacted several high-profile Medibank customers, including senior Australian government lawmakers. The U.S. Treasury Department sanctioned Ermakov shortly after the Australian government imposed first-of-its-kind sanctions against the Russian national. According to the U.S. Treasury, REvil ransomware has been deployed on approximately 175,000 computers worldwide, garnering at least $200 million in ransom payments. The FSB’s surprise operation came just months after the U.S. Department of Justice charged a 22-year-old Ukrainian citizen linked to the REvil ransomware gang due to his alleged role in the Kaseya attack.