Social EngineeringHealthcareHealthcarePhishingStolen CredentialsData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedPHIHealth (basic)Identity (basic)Government IDMediumContained

Mille Lacs Health System

bd_3ae007d21dd332ae · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 14, 2019

Filed

May 11, 2020

To disclose

26 weeks

Affected

Not disclosed

Linked

4 filings

Confidence

64%

Full breach record for Mille Lacs Health System →2 incidents on file

Mille Lacs Health System notified Montana AG of a phishing incident where employee credentials were stolen, granting unauthorized access to email accounts containing PHI and PII. Access occurred Aug 26, 2019 – Jan 7, 2020. Incident discovered Nov 14, 2019. Notices sent May 11, 2020.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 80 days

discovery → filing · 26 weeks / 179 days

Aug 26, 2019

Begins

Nov 14, 2019

Discovered

May 11, 2020

Filed

vs. sector median

+13 wks slower

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

HHS OCRbd_ab7f3d53453fd3922020-05-11Verified
New Hampshire State AGbd_10d2923b568bd44d2020-05-13 · +2dVerified
Massachusetts State AGbd_e569ec91ef8b8a052020-05-08 · +3dVerified

Name: Mille Lacs Health System
norm: mille lacs health system

Name: Mille Lacs Health System
norm: mille lacs health system
Industry: Healthcarellm

Discovered: Nov 14, 2019
Breach occurred: Aug 26, 2019 – Jan 7, 2020
Undetected for: 80 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 11, 2020
Affected individuals: Not disclosed
Data types: PHIHealth (basic)Identity (basic)Government ID
Data elements: Social Security numberDate of birthMedical information
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Commenced an investigation
Working with an independent forensic investigation firm to assist us in the investigation of and response to this incident
Terminated the unauthorized access to our employee email accounts
Reset all user account passwords
Changes made: Implemented additional technology measures in order to help prevent this type of incident from reoccurring in the future
Offering identity theft protection services through ID Experts
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 26 weeks(179 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Massachusetts State AGMay 8 · first

HHS OCR+3d

Montana State AG+3d · this page

New Hampshire State AG+5d

Pattern: first filing May 8 (MA), last May 13 (NH) — a 5-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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-167.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 11, 2020
Raw hash: efc1081ba446ee99d367018cdfd7ab04b27ce5ab6b16cc18646a95c2fdbfceeb

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityMille Lacs Health System

Victim entityMille Lacs Health System

Incidentdiscovered Nov 14, 2019

Stated responseCommenced an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov