Phoenix Art Museum
bd_765688756f67df5c · schema v1 · pii pii-v1
Full breach record for Phoenix Art Museum →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.
Source: Ransomware.live
Post text · scraped from the leak site
Phoenix Art Museum Phoenix Art Museum is an art museum that showcases art from around the U.S. in Phoenix, Arizona.
J jump to incidentP pin to compareR raw source
Incident timeline — mostly unverified
? — ?
Breach window unknown
Dec 8, 2025
Claim posted
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Corroborated · see linked filings
Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.
Claim → filing
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Compliance clock
Not assessable
Linked disclosures
Why this link?Ransomware claims (1)
- Leak Siterhysidabd_c6a5e44c7e4012fb2026-02-12 · +67dVerified by operator
Regulatory filings (4) · sorted by filing gap
- Indiana State AGbd_6923d15440e132e82026-04-15 · +128dCandidate
- Massachusetts State AGbd_8f6a417b581393b42026-04-15 · +128dVerified
- Nebraska State AGbd_98396ff1b781d70c2026-04-15 · +128dVerified
- Maine State AGbd_ec3fa204c92e6f6e2026-04-15 · +128dVerified
Filing propagation · 5 filings · 4 states
View merged incident ↗Pattern: first filing Dec 8, last Apr 15 (ME) — a 128-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.
Source ceiling
- actor name
- victim claim
- ransom/leak status
- discovery date
- materiality
- notification
- affected count
- confirmed data types
- compliance clock
The ✕ fields stay blank until a regulatory filing or victim disclosure lands.
rhysida
According to ransomware.live, Rhysida is a ransomware-as-a-service (RAAS) group that emerged in May 2023. The group utilizes a namesake ransomware through phishing attacks and Cobalt Strike to breach the targets' networks and deploy their payloads. The group threatens to publicly distribute exfiltrated data if the ransom is not paid, and it's worth mentioning that Rhysida is still in the early stages of development. The ransomware leaves PDF notes in the affected folders, instructing victims to contact the group through its portal, and payment is made via Bitcoin. After encryption, the ransomware appends the extension '.ryshida' to encrypted files. Source: https://github.com/crocodyli/ThreatActors-TTPs