Russia has conducted a special operation against ransomware crime group REvil at the request of the United States and has detained and charged the group's members, the FSB domestic intelligence service said. The arrests were a rare apparent demonstration of collaboration between Russia and the United States, at a time of high tensions between the two over Ukraine. The announcement came even as Ukraine was responding to a massive cyber attack that shut down government websites, though there was no indication the incidents were related.
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