HackingHealthcareProfessional ServicesHealthcareStolen CredentialsData ExfiltratedCustomer Data InvolvedSupply Chain (3P Vendor)Identity (basic)Government IDMediumContained

Yale New Haven Health Services Corporation

bd_f9c3c7420bcc2141 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 4, 2023

Filed

Dec 26, 2024

To disclose

13 months

Affected

Not disclosed

Linked

3 filings

Confidence

64%

Full breach record for Yale New Haven Health Services Corporation →6 incidents on file

Yale New Haven Health notified individuals of a security incident involving its vendor, Tobin, Carberry, O'Malley, Riley & Selinger, P.C. An unauthorized third party accessed TCORS's network from November 10-30, 2023, copying files containing patient information. YNHHS was notified on December 4, 2023. Notices were sent on November 18, 2024, offering identity theft protection services. The incident involved a supply chain compromise where a third-party vendor's credentials were likely used.

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Incident timeline

undetected · 24 days

discovery → filing · 13 months / 388 days

Nov 10, 2023

Begins

Dec 4, 2023

Discovered

Dec 26, 2024

Filed

vs. sector median

+44 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

New Hampshire State AGbd_14bf0242d59053752024-08-19 · +129dVerified
Vermont State AGbd_416c7062bea04db42024-08-09 · +139dCandidate

Name: Tobin, Carberry, O'Malley, Riley & Selinger, P.C.
norm: tobin carberry o malley riley selinger

Name: Yale New Haven Health Services Corporation
norm: yale new haven health
Industry: HealthcarellmProfessional Servicesllm

Discovered: Dec 4, 2023
Breach occurred: Nov 10, 2023 – Nov 30, 2023
Undetected for: 24 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 18, 2024
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Engaged third-party forensics specialists
Conducted a forensic investigation
Provided notice of the security incident to YNHHS
Provided an initial list of individuals whose information may have been stored in the copied files
Performed additional documentation review
Offered a complimentary membership of identity theft protection services through IDX
Changes made: Regularly implements measures to reduce the risk of this type of incident
Offered a complimentary membership of identity theft protection services through IDX
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 months(388 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 2 states

View merged incident ↗

Vermont State AGAug 9 · first

New Hampshire State AG+10d

New Hampshire State AG+139d · this page

Pattern: first filing Aug 9 (VT), last Dec 26 (NH) — a 139-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://mm.nh.gov/files/uploads/doj/remote-docs/tobin-carberry-omalley-riley-selinger-yale-new-haven-health-20241226.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 26, 2024
Raw hash: 5df0187f8ec7591684520627048fbae78fc5e194201302eb596b9521760d1f58

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityTobin, Carberry, O'Malley, Riley & Selinger, P.C.

Victim entityYale New Haven Health Services Corporation

Incidentdiscovered Dec 4, 2023

Stated responseEngaged third-party forensics specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov