HackingHealthcareHealthcareData ExfiltratedCustomer Data InvolvedPIIIdentity (basic)Government IDMediumContained

St. Mary's Healthcare System for Children

bd_3503a949559a2f2b · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 9, 2023

Filed

Mar 20, 2024

To disclose

19 weeks

Affected

5state residents only

Linked

5 filings

Confidence

66%

Full breach record for St. Mary's Healthcare System for Children →

St. Mary’s Healthcare System for Children, Inc. notified 5 New Hampshire residents on March 20, 2024, that an unauthorized actor accessed and copied files from its network on November 9, 2023. The organization identified suspicious activity on that date, isolated systems, and conducted a review concluding on March 7, 2024. Affected data includes personal identifiable information such as names and potentially Social Security numbers. Credit monitoring services were provided to affected individuals.

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Incident timeline

discovery → filing · 19 weeks / 132 days

Nov 9, 2023

Begins

Nov 9, 2023

Discovered

Mar 20, 2024

Filed

vs. sector median

+10 wks slower

This filing is one of 5 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Maine State AGbd_8da1ec82b5ecf5f02024-03-20Candidate
Massachusetts State AGbd_94fe68d100c3bcbe2024-03-20Verified
Indiana State AGbd_e95fc46d59c378c22024-03-20Verified
Illinois State AGbd_6414a06951afc7952024-03-01 · +19dVerified

Name: St. Mary's Healthcare System for Children
norm: st mary s healthcare system for children

Name: St. Mary's Healthcare System for Children
norm: st mary s healthcare system for children
Industry: Healthcarellm

Discovered: Nov 9, 2023
Breach occurred: Nov 9, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 20, 2024
Affected individuals: 5state-resident count only
Data types: PIIIdentity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Providing written notice of this incident to relevant state and federal regulators

During the incident: Isolated the affected systems
Began an investigation to determine what occurred
Undertook a time-intensive review of the files to determine their contents
Providing access to credit monitoring services for individuals whose personal information was potentially affected
Providing individuals with guidance on how to better protect against identity theft and fraud
Providing individuals with information on how to place a fraud alert and security freeze on one’s credit file
Providing individuals with the contact details for the national consumer reporting agencies
Providing individuals with information on how to obtain a free credit report
Providing individuals with a reminder to remain vigilant for incidents of fraud and identity theft
Providing individuals with encouragement to contact the Federal Trade Commission, their state Attorney General, and law enforcement to report attempted or actual identity theft and fraud
Providing written notice of this incident to relevant state and federal regulators
Providing written notice to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Evaluating policies, procedures, and technical security measures
Implementing additional safeguards as appropriate to further secure information in our systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 19 weeks(132 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Illinois State AGMar 1 · first

Maine State AG+19d

Massachusetts State AG+19d

Indiana State AG+19d

New Hampshire State AG+19d · this page

Pattern: first filing Mar 1 (IL), last Mar 20 (NH) — a 19-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/st-marys-healthcare-system-children-20240320.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 20, 2024
Raw hash: e57ccce15b629ea13b0642de213bef477cedffd51332911cd8824a8f40795396

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entitySt. Mary's Healthcare System for Children

Victim entitySt. Mary's Healthcare System for Children

Incidentdiscovered Nov 9, 2023

Stated responseIsolated the affected systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov