Prospect Medical Holdings, Inc.
bd_ff39eb1c7fdf07a1 · schema v1 · pii pii-v1
Full breach record for Prospect Medical Holdings, Inc. →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
Prospect Medical Holdings
J jump to incidentP pin to compareR raw source
Incident timeline — mostly unverified
? — ?
Breach window unknown
Aug 24, 2023
Claim posted
—
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?Regulatory filings (10) · sorted by filing gap
- Indiana State AGbd_01179efaed3e75352023-09-29 · +36dVerified
- HHS OCRbd_2fef4c679272ccd32023-09-29 · +36dVerified
- New Hampshire State AGbd_35efeda2e5a8d88f2023-09-29 · +36dVerified
- Maine State AGbd_6ef44d457fd8b2602023-09-29 · +36dVerified
Show 6 more filings ↓Show fewer ↑up to 190d gap
- Vermont State AGbd_91573382e8c024192023-09-29 · +36dVerified
- California State AGbd_bd24866d0fea52f92023-09-29 · +36dVerified
- Massachusetts State AGbd_c20d4bad3ff6d87f2023-09-29 · +36dVerified
- California State AGbd_e78b914f634463f72023-12-13 · +111dVerified
- New Hampshire State AGbd_610b4d3b2e537df72024-02-29 · +189dVerified
- Massachusetts State AGbd_e9100cb92bc339de2024-03-01 · +190dVerified
Showing first 10 of 12 linked disclosures.
Filing propagation · 11 filings · 6 states
View merged incident ↗Pattern: first filing Aug 24, last Mar 1 (MA) — a 190-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Cascade drawn from the first 10 linked disclosures of 12 — the full spread may be wider.
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