GLOBALMalwareGovernmentGovernmentRansomwareRhysidaRansom DemandedActor NamedMedium
Cheyenne & Arapaho Tribes
bd_53c611bc66c04437 · schema v1 · pii pii-v1
Full breach record for Cheyenne & Arapaho Tribes →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Rhysida on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.
Group activity: Public SectorDiscovered: 2026-02-17
Source: Ransomware.live
Post text · scraped from the leak site
Cheyenne & Arapaho Tribes The Cheyenne and Arapaho Tribes are a federally recognized united nation of two distinct peoples-the Tsistsistas (Cheyenne) and Hinono'ei (Arapaho)-with a historic alliance formed in the early 19th century.
Tracked as a single-filing incident — the only disclosure on record for this event so far.Unverified claimView incident
No regulatory filing corroborates this yet. If an SEC 8-K, state-AG notice, or victim statement lands, DisclosureLens will merge it into an incident and link it here.
Source provenance
- Source URL
- https://www.ransomware.live/id/Q2hleWVubmUgJiBBcmFwYWhvIFRyaWJlc0ByaHlzaWRh
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
- Filed at
- Dec 8, 2025
- Raw hash
- fb9bc8551f3b5c68893c54b36f28766976e7e70cdb4af1a0f6a08c62984a6757
Reporting entity
- Name
- rhysida
Victim entity
- Name
- Cheyenne & Arapaho Tribesnorm: cheyenne arapaho tribes
- Domain
- cheyenneandarapaho-nsn.gov
- Industry
- Government
What this source establishes
- Source ceiling
- A leak-site claim can't tell us: discovery date · materiality · notification · affected count · confirmed data types · compliance clock. These stay blank until a regulatory filing or victim disclosure lands.
- Attack vector
- Ransomware· rhysida
- Threat actor
- RhysidaExternalFinancial
Compliance
- Compliance flags
- — (clock not assessable for this source)
Extraction provenance
- Status
- No extraction artifact recorded for this disclosure.