HackingHealthcareHealthcareCustomer Data InvolvedDelayed DiscoveryPHIGovernment IDIdentity (basic)Health (basic)MediumActive

MCLAREN HEALTH CARE CORPORATION

bd_e37f582cfe47b024 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 22, 2023

Filed

Nov 9, 2023

To disclose

11 weeks

Affected

107state residents only

Linked

11 records

Confidence

66%

Full breach record for MCLAREN HEALTH CARE CORPORATION →3 incidents on file

McLaren Health Care notified the Idaho Attorney General on November 9, 2023, of unauthorized network access occurring between July 28 and August 23, 2023. The incident potentially affected 107 Idaho residents, exposing names, Social Security numbers, and health information. McLaren engaged forensic specialists, notified law enforcement, and provided 12 months of credit monitoring to affected individuals.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d11 weeks discovery → filing

Incident timeline

undetected · 25 days

discovery → filing · 11 weeks / 79 days

Jul 28, 2023

Begins

Aug 22, 2023

Discovered

Nov 9, 2023

Filed

vs. sector median

+2 wks slower

This filing is one of 11 records about the same incident.View merged incident

A leak claim by alphv about this victim was first seen 41 days before this filing.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 by operator

Regulatory filings (8) · sorted by filing gap

California State AGbd_8d2f2b3098afeb792023-11-09Verified by operator
Montana State AGbd_bd9b0633195a292f2023-11-09Verified by operator
Maine State AGbd_c24689bd6cff46e02023-11-09Verified
Massachusetts State AGbd_ddb258a8d643b7952023-11-09Verified by operator

Show 4 more filings ↓up to 312d gap

New Hampshire State AGbd_e2978f252f8567182023-11-09Verified by operator
Vermont State AGbd_ed0fb31e367c93232023-11-09Verified by operator
HHS OCRbd_18c5455f0815045b2023-10-20 · +20dVerified
Illinois State AGbd_7374d2c287e33ed62023-01-01 · +312dVerified by operator

Name: Mullen Coughlin LLC
norm: mullen coughlin

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

Discovered: Aug 22, 2023
Breach occurred: Jul 28, 2023 – Aug 23, 2023
Undetected for: 25 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 9, 2023
Affected individuals: 107state-resident count only
Data types: Identity (basic)Government IDHealth (basic)PHI
Data elements: Social Security numberDate of birthMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Regulator citations: Notified Idaho Attorney General Consumer Protection Division
Initial access: exploit_public_facing

During the incident: Launched an investigation with the assistance of third-party forensic specialists
Secured its network
Notified federal law enforcement
Provided substitute via website and media notice
Provided written notice of this incident to approximately one hundred seven (107) Idaho residents
Providing access to credit monitoring services for twelve (12) months through IDX
Changes made: Working to implement additional safeguards and training to its employees
Review our existing policies and procedures and to implement additional administrative and technical safeguards
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(79 days from discovery to filing)
Compliance flags: Leak >30d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 9 filings · 9 states

View merged incident ↗

Illinois State AGJan 1 · first

HHS OCR+292d

California State AG+312d

Montana State AG+312d

Maine State AG+312d

Massachusetts State AG+312d

New Hampshire State AG+312d

Vermont State AG+312d

Idaho State AG+312d · this page

Pattern: first filing Jan 1 (IL), last Nov 9 (ID) — a 312-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.ag.idaho.gov/content/uploads/2023/11/11-9-2023-McLaren-Health-Care.pdf
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: da4a78052fcebba55da1c44eb64073a9bcad9ac47a5dcb0f635f3006d86c6990

Linked disclosures

Ransomware claims (2)

Regulatory filings (8) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityMCLAREN HEALTH CARE CORPORATION

Incidentdiscovered Aug 22, 2023

Stated responseLaunched an investigation with the assistance of third-party forensic specialists

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancewww.ag.idaho.gov