HackingHealthcareHealthcareDelayed DiscoveryPIIIdentity (basic)MediumActive

Advanced Care Hospital of Montana

bd_6e498a71aa89a910 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 1, 2024

Filed

Mar 29, 2024

To disclose

8 weeks

Affected

2,190state residents only

Linked

2 filings

Confidence

64%

Full breach record for Advanced Care Hospital of Montana →4 incidents on file

Advanced Care Hospital of Montana notified individuals of a data breach where unauthorized access occurred between Jan 16 and Feb 4, 2024. The hospital detected unusual activity on Feb 1, 2024, and engaged third-party cybersecurity and law enforcement. Patient and employee PII may have been accessed. Credit monitoring offered.

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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

3 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_0d977ed5bbedefe22024-04-02 · +4dVerified

Name: Advanced Care Hospital of Montana
norm: advanced care hospital of montana

Name: Advanced Care Hospital of Montana
norm: advanced care hospital of montana
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: 2,190state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: in communication with law enforcement

During the incident: Promptly secured and isolated our IT systems
Commenced an investigation with assistance from a third-party cybersecurity firm
In communication with law enforcement
Offering you a complimentary one-year membership to Identity Defense Complete
Changes made: Implemented, and will continue to adopt, additional safeguards and technical security measures to further protect and monitor our 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

View merged incident ↗

Montana State AGMar 29 · first · this page

HHS OCR+4d

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-1243.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: 26a79b4757103bf435642a48cdb7a595fa552f2f613568fc91c3bcd1ccd3e51d

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityAdvanced Care Hospital of Montana

Victim entityAdvanced Care Hospital of Montana

Incidentdiscovered Feb 1, 2024

Stated responsePromptly secured and isolated our IT systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov