Social EngineeringHealthcareHealthcarePhishingTargetedPIIPHIIdentity (basic)Health (basic)LowContained

Five Rivers Health Centers

bd_15ca1140bfb69f8f · schema v1 · pii pii-v1

Severity

Low

Discovered

Mar 31, 2021

Filed

May 28, 2021

To disclose

8 weeks

Affected

4state residents only

Linked

3 filings

Confidence

66%

Full breach record for Five Rivers Health Centers →

Five Rivers Health Centers notified Montana residents of a phishing campaign that compromised employee email accounts. Access occurred between April 1 and June 2, 2020. Investigation concluded March 31, 2021, revealing PHI and PII were present in accessed accounts, though no evidence of acquisition or misuse was found. Remediation included MFA and training.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 364 days

discovery → filing · 8 weeks / 58 days

Apr 1, 2020

Begins

Mar 31, 2021

Discovered

May 28, 2021

Filed

vs. sector median

4 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_3d507b423e33353b2021-05-28Verified
HHS OCRbd_76486e17a62aa7ca2021-05-28Verified

Name: Five Rivers Health Centers
norm: five rivers health centers

Name: Five Rivers Health Centers
norm: five rivers health centers
Industry: Healthcarellm

Discovered: Mar 31, 2021
Breach occurred: Apr 1, 2020 – Jun 2, 2020
Undetected for: 364 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 4state-resident count only
Data types: PIIPHIIdentity (basic)Health (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1114 Email Collection
Threat actor: External
Initial access: phishing_link

During the incident: Secured the accounts
Commenced a prompt and thorough investigation
Worked very closely with external cybersecurity professionals
Conducted an extensive forensic investigation
Conducted a comprehensive manual document review
Changes made: Implementing two-factor authentication
Reviewing and revising policies and procedures
Requiring additional cybersecurity training for all employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(58 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Massachusetts State AGMay 28 · first

HHS OCRMay 28 · first

Montana State AGMay 28 · 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/a-notif-24.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 28, 2021
Raw hash: 42346c781981ac83b9ae06c9245deedd94c7064c3306523e487a0e8668d77973

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityFive Rivers Health Centers

Victim entityFive Rivers Health Centers

Incidentdiscovered Mar 31, 2021

Stated responseSecured the accounts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov