HackingHealthcareHealthcareCustomer Data InvolvedPIIGovernment IDCriticalContained

MCLAREN HEALTH CARE CORPORATION

bd_c24689bd6cff46e0 · schema v1 · pii pii-v1

Severity

Critical

Discovered

Oct 10, 2023

Filed

Nov 9, 2023

To disclose

4 weeks

Affected · nationwide

2,192,51577 in this filing

Linked

10 filings

Confidence

50%

Full breach record for MCLAREN HEALTH CARE CORPORATION →4 incidents on file

McLaren Health Care reported a data breach affecting 77 Maine residents after an external system breach (hacking) that occurred between July 28, 2023, and August 23, 2023. The breach was discovered on October 10, 2023, and involved the compromise of Social Security numbers. The company began notifying affected individuals on November 9, 2023, and offered 12 months of credit monitoring services.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d4 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 74 days

discovery → filing · 4 weeks / 30 days

Jul 28, 2023

Begins

Oct 10, 2023

Discovered

Nov 9, 2023

Filed

vs. sector median

8 wks faster

This filing is one of 10 about the same incident.View merged incident

A leak claim by alphv about this victim predates this filing by 40 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (2)

Leak Sitealphvbd_6326acdfc9de458a2023-10-04 · +35dVerified by operator
Leak Sitealphvbd_c4b2c0198b70501e2023-09-29 · +40dVerified

Regulatory filings (7) · sorted by filing gap

California State AGbd_8d2f2b3098afeb792023-11-09Verified by operator
Montana State AGbd_bd9b0633195a292f2023-11-09Verified by operator
Massachusetts State AGbd_ddb258a8d643b7952023-11-09Verified by operator
New Hampshire State AGbd_e2978f252f8567182023-11-09Verified by operator

Show 3 more filings ↓up to 20d gap

Idaho State AGbd_e37f582cfe47b0242023-11-09Verified by operator
Vermont State AGbd_ed0fb31e367c93232023-11-09Verified by operator
HHS OCRbd_18c5455f0815045b2023-10-20 · +20dVerified

Name: MCLAREN HEALTH CARE CORPORATION
norm: mclaren health care
Domain: mclaren.org

Name: MCLAREN HEALTH CARE CORPORATION
norm: mclaren health care
Domain: mclaren.org
Industry: Healthcarellm

Discovered: Oct 10, 2023
Breach occurred: Jul 28, 2023 – Aug 23, 2023
Undetected for: 74 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 9, 2023
Affected individuals: 2,192,515state + nationwide
Data types: PIIGovernment ID
Data elements: Social Security number
Attack vector: Unauthorized Access

Changes made: Offered 12 months of credit monitoring services through IDX.
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 4 weeks(30 days from discovery to filing)
Compliance flags: Leak >30dME AG ≤30d · 30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Oct 10, 2023
→ Filed with AG: Nov 9, 2023
30d 30 days ME AG ≤30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Oct 10, 2023 → Filed with AG: Nov 9, 2023	30d	30 days	ME AG ≤30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 8 states

View merged incident ↗

HHS OCROct 20 · first

California State AG+20d

Montana State AG+20d

Massachusetts State AG+20d

New Hampshire State AG+20d

Idaho State AG+20d

Vermont State AG+20d

Maine State AG+20d · this page

Pattern: first filing Oct 20 (MI), last Nov 9 (ME) — a 20-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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/40c59f93-d7fd-4133-8148-a05a244b96b7.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 9, 2023
Raw hash: 18c6e826dd2a80d88c906a8f6dc9aaeb30b507e02e8d57d1fc6ad9399a981b80

Linked disclosures

Ransomware claims (2)

Regulatory filings (7) · sorted by filing gap

Reporting entityMCLAREN HEALTH CARE CORPORATION

Victim entityMCLAREN HEALTH CARE CORPORATION

Incidentdiscovered Oct 10, 2023

Stated responseOffered 12 months of credit monitoring services through IDX.

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov