Social EngineeringHealthcareHealthcarePhishingStolen CredentialsCustomer Data InvolvedTargetedPIIIdentity (basic)PHIHealth (basic)LowContained

Advanced Care Hospital of Montana

bd_60957072a4aece1c · schema v1 · pii pii-v1

Severity

Low

Discovered

Feb 10, 2020

Filed

Apr 15, 2020

To disclose

9 weeks

Affected

22state residents only

Confidence

66%

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

Advanced Care Hospital of Montana notified patients of unauthorized access to an employee email account containing PHI between Feb 3-8, 2020. Discovered Feb 10, 2020. Data included names, DOBs, and clinical info. No misuse indicated. MFA implemented.

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Incident timeline

undetected · 7 days

discovery → filing · 9 weeks / 65 days

Feb 3, 2020

Begins

Feb 10, 2020

Discovered

Apr 15, 2020

Filed

vs. sector median

on median

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed22 affectedView incident

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 10, 2020
Breach occurred: Feb 3, 2020 – Feb 8, 2020
Undetected for: 7 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 22state-resident count only
Data types: PIIIdentity (basic)PHIHealth (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: External
Initial access: phishing_link

During the incident: Conducted an investigation to determine how the incident occurred and what information was contained in the email account
Reinforcing education with our staff on email security
Enhanced email security tools, including implementing multi-factor authentication
Changes made: Reinforcing education with our staff on email security
Enhanced email security tools, including implementing multi-factor authentication
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(65 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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/Breach-NotificationDetails-154.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 15, 2020
Raw hash: 02cff00033acadc3bab7dfc44cbc2347176e68f207409659dbb974cc9bff4cf4

Reporting entityAdvanced Care Hospital of Montana

Victim entityAdvanced Care Hospital of Montana

Incidentdiscovered Feb 10, 2020

Stated responseConducted an investigation to determine how the incident occurred and what information was contained in the email account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov