Social EngineeringHealthcareHealthcarePhishingTargetedCustomer Data InvolvedPIIIdentity (basic)PHIHealth (basic)LowContained

Rocky Mountain Oncology Care

bd_373c6f91bed22fda · schema v1 · pii pii-v1

Severity

Low

Discovered

Jun 13, 2025

Filed

Jul 15, 2025

To disclose

5 weeks

Affected

38state residents only

Linked

3 filings

Confidence

66%

Full breach record for Rocky Mountain Oncology Care →3 incidents on file

Rocky Mountain Oncology Care notified Montana residents of a phishing incident. Unauthorized access to patient email and SharePoint accounts occurred Dec 13-16, 2024. The company discovered the incident on June 13, 2025. Patient PII and PHI were accessed. No evidence of misuse found. Staff cybersecurity training is being provided.

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Incident timeline

undetected · 182 days

discovery → filing · 5 weeks / 32 days

Dec 13, 2024

Begins

Jun 13, 2025

Discovered

Jul 15, 2025

Filed

vs. sector median

6 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

Illinois State AGbd_6c0bdee5e1c2e51b2025-07-01 · +14dCandidate
HHS OCRbd_dd12692b0b377b102025-06-27 · +18dCandidate

Name: Rocky Mountain Oncology Care
norm: rocky mountain oncology care

Name: Rocky Mountain Oncology Care
norm: rocky mountain oncology care
Industry: Healthcarellm

Discovered: Jun 13, 2025
Breach occurred: Dec 13, 2024 – Dec 16, 2024
Undetected for: 182 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 38state-resident count only
Data types: PIIIdentity (basic)PHIHealth (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1114 Email Collection
Threat actor: External
Initial access: phishing_link

During the incident: Measures were taken immediately in response
A thorough investigation was conducted
A review was performed of the emails, attachments, and SharePoint files
Additional cybersecurity training is being provided to staff
Changes made: Additional cybersecurity training is being provided to staff
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(32 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 ↗

HHS OCRJun 27 · first

Illinois State AG+4d

Montana State AG+18d · this page

Pattern: first filing Jun 27 (WY), last Jul 15 (MT) — a 18-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/2025/08/Consumer-notification-letter-26.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 15, 2025
Raw hash: 8936175797336ed7a3a0f19e3a7763944910e6ee86a47175044742297b74527e

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityRocky Mountain Oncology Care

Victim entityRocky Mountain Oncology Care

Incidentdiscovered Jun 13, 2025

Stated responseMeasures were taken immediately in response

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov