HackingHealthcareHealthcareCustomer Data InvolvedDelayed DiscoveryPIIIdentity (basic)LowActive

Mountain Valley Regional Rehabilitation Hospital

bd_b128773805fe64d4 · schema v1 · pii pii-v1

Severity

Low

Discovered

Feb 1, 2024

Filed

Mar 29, 2024

To disclose

8 weeks

Affected

1state residents only

Linked

2 filings

Confidence

63%

Full breach record for Mountain Valley Regional Rehabilitation Hospital →3 incidents on file

Mountain Valley Regional Rehabilitation Hospital notified Montana residents of a data breach where unauthorized access occurred between Jan 16 and Feb 4, 2024. Patient names and other PII were potentially accessed. The hospital engaged forensic investigators and law enforcement, offering credit monitoring to affected individuals.

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Incident timeline

undetected · 16 days

discovery → filing · 8 weeks / 57 days

Jan 16, 2024

Begins

Feb 1, 2024

Discovered

Mar 29, 2024

Filed

vs. sector median

4 wks faster

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

HHS OCRbd_6e8d4b4e42e9a79f2024-03-29Verified

Name: Mountain Valley Regional Rehabilitation Hospital
norm: mountain valley regional rehabilitation hospital

Name: Mountain Valley Regional Rehabilitation Hospital
norm: mountain valley regional rehabilitation hospital
Industry: Healthcarellm

Discovered: Feb 1, 2024
Breach occurred: Jan 16, 2024 – Feb 4, 2024
Undetected for: 16 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: In communication with law enforcement

During the incident: Secured and isolated IT systems
Commenced an investigation with assistance from a third-party cybersecurity firm
In communication with law enforcement
Offering complimentary one-year membership to Identity Defense Complete
Changes made: Implemented additional safeguards and technical security measures to further protect and monitor systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(57 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

HHS OCRMar 29 · first

Montana State AGMar 29 · 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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-1245.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 29, 2024
Raw hash: 74d01996797f83899798655ccf7c4c5e5562a1b97fbb5de38ee1bb1a2e8e0156

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMountain Valley Regional Rehabilitation Hospital

Victim entityMountain Valley Regional Rehabilitation Hospital

Incidentdiscovered Feb 1, 2024

Stated responseSecured and isolated IT systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov