HackingHealthcareHealthcareDelayed DiscoveryIdentity (basic)Government IDMediumContained

Tri-City Healthcare District

bd_7d4d250c4c2f3d53 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 9, 2023

Filed

Apr 4, 2024

To disclose

21 weeks

Affected

27state residents only

Linked

7 filings

Confidence

65%

Full breach record for Tri-City Healthcare District →4 incidents on file

Tri-City Healthcare District notified Montana residents of a data breach where an unknown actor accessed personal information including names and SSNs. Access occurred around Nov 8, 2023; discovered Nov 9, 2023. Notification sent April 4, 2024. FBI and DHS notified. Credit monitoring offered.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 1 days

discovery → filing · 21 weeks / 147 days

Nov 8, 2023

Begins

Nov 9, 2023

Discovered

Apr 4, 2024

Filed

vs. sector median

+10 wks slower

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

Maine State AGbd_14769f608cc691522024-04-04Verified
Vermont State AGbd_334b0f94cc2937a32024-04-04Verified
Massachusetts State AGbd_5fe587e653ca1bfc2024-04-04Verified
New Hampshire State AGbd_7d1174f7723f487c2024-04-04Verified

Show 2 more filings ↓

Indiana State AGbd_a04472851663bc222024-04-04Verified
California State AGbd_d4c8c74c6bcb6edf2024-04-04Verified

Name: Tri-City Healthcare District
norm: tri city healthcare district

Name: Tri-City Healthcare District
norm: tri city healthcare district
Industry: Healthcarellm

Discovered: Nov 9, 2023
Breach occurred: Nov 8, 2023
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Apr 4, 2024
Affected individuals: 27state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified the Federal Bureau of InvestigationNotified U.S. Department of Homeland Security

During the incident: Engaged leading cybersecurity experts to assist with an investigation
Took steps to secure our digital environment
Notified the Federal Bureau of Investigation
Notified U.S. Department of Homeland Security
Changes made: Implemented additional security features to reduce the risk of a similar incident occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 21 weeks(147 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

Maine State AGApr 4 · first

Vermont State AGApr 4 · first

Massachusetts State AGApr 4 · first

New Hampshire State AGApr 4 · first

Indiana State AGApr 4 · first

California State AGApr 4 · first

Montana State AGApr 4 · 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-1267.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 4, 2024
Raw hash: de96a7b08e3f7f2eec2d9902fc2c5f5d62ce5572e4b1ae6278062d01aa2a5a0d

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityTri-City Healthcare District

Victim entityTri-City Healthcare District

Incidentdiscovered Nov 9, 2023

Stated responseEngaged leading cybersecurity experts to assist with an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov