Comparitech is reporting that the ransomware gang Rhysida yesterday took credit for a December 2025 cyber attack against the Cheyenne and Arapaho Tribes’ IT systems.
Commenting on this is Rebecca Moody, Head of Data Research at Comparitech:
“At the moment, it’s unclear what, if any, data Rhysida has actually stolen. According to the initial statement from the Cheyenne and Arapaho Tribes, no data was impacted in the recent cyber attack. However, we sometimes see these statements being updated following further investigations. Alternatively, Rhysida could have been successful in encrypting systems but not in stealing data, and has decided to try its luck at securing a ransom demand by alleging a breach anyway.
Whatever the case, it’s important that the Cheyenne and Arapaho Tribes promptly address these latest claims and confirm whether or not Rhysida’s allegations are true. If data has been impacted, it’s crucial employees and citizens are able to take all of the necessary steps to safeguard their data as soon as possible. As a precaution, I’d recommend that they’re on high alert for any phishing messages and monitor accounts for any suspicious activity, just in case.”
Rhysida is another one of those threat actors who are claiming victims on a frequent basis. Your goal is to not be one of those victims. So consider securing your organization from threat actors like Rhysida a priority.
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This entry was posted on February 18, 2026 at 1:22 pm and is filed under Commentary with tags Hacked. You can follow any responses to this entry through the RSS 2.0 feed.
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Cyber Attack Against Cheyenne and Arapaho Tribes Claimed by Rhysida
Comparitech is reporting that the ransomware gang Rhysida yesterday took credit for a December 2025 cyber attack against the Cheyenne and Arapaho Tribes’ IT systems.
Commenting on this is Rebecca Moody, Head of Data Research at Comparitech:
“At the moment, it’s unclear what, if any, data Rhysida has actually stolen. According to the initial statement from the Cheyenne and Arapaho Tribes, no data was impacted in the recent cyber attack. However, we sometimes see these statements being updated following further investigations. Alternatively, Rhysida could have been successful in encrypting systems but not in stealing data, and has decided to try its luck at securing a ransom demand by alleging a breach anyway.
Whatever the case, it’s important that the Cheyenne and Arapaho Tribes promptly address these latest claims and confirm whether or not Rhysida’s allegations are true. If data has been impacted, it’s crucial employees and citizens are able to take all of the necessary steps to safeguard their data as soon as possible. As a precaution, I’d recommend that they’re on high alert for any phishing messages and monitor accounts for any suspicious activity, just in case.”
Rhysida is another one of those threat actors who are claiming victims on a frequent basis. Your goal is to not be one of those victims. So consider securing your organization from threat actors like Rhysida a priority.
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This entry was posted on February 18, 2026 at 1:22 pm and is filed under Commentary with tags Hacked. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.