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Ransomware Attack Disrupts Cheyenne and Arapaho Tribes' Operations

Ransomware Attack Disrupts Cheyenne and Arapaho Tribes' Operations

First seen 19 Feb 2026, 16:18 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 16:10 UTC

The Cheyenne and Arapaho Tribes in Oklahoma experienced a ransomware attack that forced the shutdown of tribal computer networks, disrupting email and phone services. The attack has led to the temporary suspension of some operations as systems are being restored and investigations are underway.

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Updated 213d ago How this analysis works

Timeline

2026-02-18
Ransomware attack disrupts tribal systems and services
2026-02-19
Tribal government reports extortion by ransomware gang

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