AccidentalHealthcareFinancial ServicesHealthcareMisdeliveryCustomer Data InvolvedPHIIdentity (basic)Health (basic)LowResolved

Blue Cross and Blue Shield of Montana

bd_bfc4edd18091521d · schema v1 · pii pii-v1

Severity

Low

Discovered

Jan 15, 2020

Filed

Mar 6, 2020

To disclose

7 weeks

Affected

3state residents only

Confidence

65%

Blue Cross and Blue Shield of Montana notified members of a data breach where PHI, including names, DOBs, and medical info, may have been viewed by another member due to a system processing error on the Blue Access for Members portal. The incident occurred between Dec 12, 2019 and Jan 24, 2020, and was discovered on Jan 15, 2020.

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Incident timeline

undetected · 34 days

discovery → filing · 7 weeks / 51 days

Dec 12, 2019

Begins

Jan 15, 2020

Discovered

Mar 6, 2020

Filed

vs. sector median

5 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed3 affectedView incident

Name: Blue Cross and Blue Shield of Montana
norm: blue cross and blue shield of montana

Name: Blue Cross and Blue Shield of Montana
norm: blue cross and blue shield of montana
Industry: HealthcarellmFinancial Servicesllm

Discovered: Jan 15, 2020
Breach occurred: Dec 12, 2019 – Jan 24, 2020
Undetected for: 34 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 4, 2020
Affected individuals: 3state-resident count only
Data types: PHIIdentity (basic)Health (basic)
Attack vector: Misconfiguration
MITRE ATT&CK: T1119 Automated Collection
Threat actor: External

During the incident: The BAM account was suspended
The system error was identified
Management has been informed of the issue and is working with internal staff to correct the problem
Changes made: Working with internal staff to correct the problem to prevent disclosures of this nature from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(51 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-127.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 6, 2020
Raw hash: 2349797d5da8eb318c8b20c3b1b0638278d3a2a0569153e87000f565bb20d304

Reporting entityBlue Cross and Blue Shield of Montana

Victim entityBlue Cross and Blue Shield of Montana

Incidentdiscovered Jan 15, 2020

Stated responseThe BAM account was suspended

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov