HackingHealthcareHealthcareCustomer Data InvolvedPIIPHIIdentity (basic)LowContained

Weiser Memorial Hospital

bd_3b546dd04f86e3f0 · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 4, 2024

Filed

May 12, 2025

To disclose

36 weeks

Affected

251state residents only

Linked

8 records

Confidence

64%

Full breach record for Weiser Memorial Hospital →

Weiser Memorial Hospital notified Montana residents of a data security incident discovered on September 4, 2024. Unauthorized access to network activity resulted in potential exposure of personal and protected health information. The hospital engaged cybersecurity experts, secured systems, and is offering complimentary credit monitoring and identity protection services to affected individuals.

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Leak gap clock✗ Leak >180d36 weeks discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 36 weeks / 250 days

Sep 4, 2024

Begins

Sep 4, 2024

Discovered

May 12, 2025

Filed

vs. sector median

+27 wks slower

This filing is one of 8 records about the same incident.View merged incident

A leak claim by embargo about this victim was first seen 224 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteembargobd_1181223707c249442024-09-09 · +245dVerified by operator

Regulatory filings (6) · sorted by filing gap

Indiana State AGbd_3dbbf38f268e89b02025-05-12Verified
Vermont State AGbd_b1e67eb07603ddca2025-05-12Verified by operator
Maine State AGbd_c8db8c8028fa97a12025-05-13 · +1dVerified
Washington State AGbd_d48216aee2888a042025-05-13 · +1dVerified

Show 2 more filings ↓up to 3d gap

Oregon State AGbd_edb68c5afd87d10a2025-05-13 · +1dVerified
California State AGbd_05cc3ed436d668872025-05-15 · +3dVerified by operator

Name: Weiser Memorial Hospital
norm: weisermemorialhospitalorg
Domain: weisermemorialhospital.org

Name: Weiser Memorial Hospital
norm: weisermemorialhospitalorg
Domain: weisermemorialhospital.org
Industry: Healthcarellm

Discovered: Sep 4, 2024
Breach occurred: Sep 4, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 251state-resident count only
Data types: PIIPHIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Engaged cybersecurity experts to assist with the process
Took steps to secure systems
Undertook a comprehensive review of all potentially affected files
Providing access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Providing proactive fraud assistance
Changes made: Implemented measures to enhance network security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 36 weeks(250 days from discovery to filing)
Compliance flags: Leak >180d
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

Indiana State AGMay 12 · first

Vermont State AGMay 12 · first

Montana State AGMay 12 · first · this page

Maine State AG+1d

Washington State AG+1d

Oregon State AG+1d

California State AG+3d

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://dojmt.gov/wp-content/uploads/2025/05/Consumer-notification-letter.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 12, 2025
Raw hash: 00bdf160422e395ad3d55442ad569cb1b04b07b04b9a462ca5afb16ddc7187b8

Linked disclosures

Ransomware claims (1)

Regulatory filings (6) · sorted by filing gap

Reporting entityWeiser Memorial Hospital

Victim entityWeiser Memorial Hospital

Incidentdiscovered Sep 4, 2024

Stated responseEngaged cybersecurity experts to assist with the process

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancedojmt.gov