HackingHealthcareHealthcareStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)Government IDFinancial accountMediumContained

McKenzie Memorial Hospital

bd_aa5561ddf0b0a58f · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 15, 2025

Filed

Jul 24, 2025

To disclose

14 weeks

Affected

2state residents only

Linked

6 filings

Confidence

65%

Full breach record for McKenzie Memorial Hospital →

McKenzie Memorial Hospital notified the NH AG of a data incident where an unauthorized actor accessed files between April 14-15, 2025. The breach affected 2 NH residents, exposing names, SSNs, and financial account info. The hospital engaged law enforcement and forensic specialists, secured the network, and offered 12 months of credit monitoring.

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Incident timeline

undetected · 1 days

discovery → filing · 14 weeks / 100 days

Apr 14, 2025

Begins

Apr 15, 2025

Discovered

Jun 19, 2025

Scope determined

Jul 24, 2025

Filed

vs. sector median

+2 wks slower

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Nebraska State AGbd_19338d9fd8ccb5b92025-07-24Verified
Massachusetts State AGbd_3c9e3624eb9b32012025-07-24Verified
Vermont State AGbd_3cb138a829f15ef92025-07-24Verified
Maine State AGbd_457ee2e873164bb42025-07-24Verified

Show 1 more filing ↓

HHS OCRbd_4cdd9242a38ba23f2025-07-24Verified

Name: McKenzie Memorial Hospital
norm: mckenzie memorial hospital

Name: McKenzie Memorial Hospital
norm: mckenzie memorial hospital
Industry: Healthcarellm

Discovered: Apr 15, 2025
Breach occurred: Apr 14, 2025 – Apr 15, 2025
Undetected for: 1 dayoccurrence → discovery
Materiality determined: Jun 19, 2025
Notification sent: Jul 24, 2025
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney General Consumer Protection Bureau
Initial access: valid_credentials

During the incident: Took immediate action to secure the network, contain, and remediate the incident
Notified law enforcement
Engaged third-party specialists to conduct an investigation
Conducted a thorough review of the potentially impacted data
Offering 12 months of complimentary credit monitoring and identity protection services
Changes made: Took steps to strengthen our network security
Conducted a thorough investigation
Took actions to mitigate the risk to the data
Reviewed our policies and procedures related to data protection to help prevent similar incidents from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(100 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 6 states

View merged incident ↗

Nebraska State AGJul 24 · first

Massachusetts State AGJul 24 · first

Vermont State AGJul 24 · first

Maine State AGJul 24 · first

HHS OCRJul 24 · first

New Hampshire State AGJul 24 · first · this page

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/mckenzie-memorial-hospital-20250724.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 24, 2025
Raw hash: 7bf778f5f61f4ec5fe5a3a3105e7d3cc12ad872266a2a6c39839d78f8a6df43c

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityMcKenzie Memorial Hospital

Victim entityMcKenzie Memorial Hospital

Incidentdiscovered Apr 15, 2025

Stated responseTook immediate action to secure the network, contain, and remediate the incident

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov