MalwareHealthcareHealthcareData ExfiltratedPIIPHIIdentity (basic)Government IDHealth (basic)HighContained

Acadia Montana Treatment Center

bd_a8063f5374d22c83 · schema v1 · pii pii-v1

Severity

High

Discovered

Mar 18, 2019

Filed

May 17, 2019

To disclose

9 weeks

Affected

3,543state residents only

Linked

2 filings

Confidence

65%

Full breach record for Acadia Montana Treatment Center →

Acadia Montana Treatment Center notified Montana residents of a malware infection on an employee's computer that led to unauthorized access to email and network files between Sept 18 and Nov 15, 2018. The incident was discovered on March 18, 2019. Data potentially exposed included names, SSNs, DOBs, medical records, and insurance info. No evidence of misuse was found. Experian IdentityWorks was offered.

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Incident timeline

undetected · 181 days

discovery → filing · 9 weeks / 60 days

Sep 18, 2018

Begins

Mar 18, 2019

Discovered

May 17, 2019

Filed

vs. sector median

2 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_70d818cfe9f49f4e2019-05-17Candidate

Name: Acadia Montana Treatment Center
norm: acadia montana treatment center

Name: Acadia Montana Treatment Center
norm: acadia montana treatment center
Industry: Healthcarellm

Discovered: Mar 18, 2019
Breach occurred: Sep 18, 2018 – Nov 15, 2018
Undetected for: 181 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 3,543state-resident count only
Data types: PIIPHIIdentity (basic)Government IDHealth (basic)
Data elements: Social Security numberDate of birthMedical information
Attack vector: Unknown
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: External
Initial access: phishing_attachment

During the incident: Commenced a prompt and thorough investigation
Worked very closely with external cybersecurity professionals
Offering a complimentary one-year membership of Experian IdentityWorks SM Credit 3B
Changes made: Continually evaluate and modify our practices to enhance the security and privacy of your personal and protected health information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(60 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 ↗

HHS OCRMay 17 · first

Montana State AGMay 17 · 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-Notice-13.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 17, 2019
Raw hash: 07022bd75bcd0b47d83823c8d8b614fc15dcec279a6c7106014805bdb1d31ba9

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityAcadia Montana Treatment Center

Victim entityAcadia Montana Treatment Center

Incidentdiscovered Mar 18, 2019

Stated responseCommenced a prompt and thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov