Ransomware gang threatens Cheyenne and Arapaho Tribes after shutting down schools The government of the Cheyenne and Arapaho Tribes is being extorted by cybercriminals after a ransomware attack shut down its schools and critical systems in January. The Rhysida ransomware gang took credit for the attack this week and demanded 10 bitcoin, or about $660,000, in exchange for not leaking information stolen from the systems of the Cheyenne and Arapaho Tribes, a federally recognized government headquartered in Concho, Oklahoma. Officials previously confirmed the ransomware attack in January. The tribal government said the cyberattack began on December 8, 2025, when its IT team discovered an attempted intrusion by threat actors. Systems were shut down and the tribe worked with its insurance…