HackingHealthcareProfessional ServicesHealthcareStolen CredentialsData MishandlingSupply Chain (3P Vendor)Customer Data InvolvedPIIIdentity (basic)Financial accountMediumContained

Logan Health

bd_3fb4ef9edd4f74a4 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 23, 2021

Filed

Jul 21, 2021

To disclose

17 weeks

Affected

2,081state residents only

Confidence

66%

Full breach record for Logan Health →2 incidents on file

Logan Health notified Montana DOJ of a data breach involving a third-party service provider, Guidehouse. The incident occurred in late January 2021, compromising secure file transfer services. Affected data included names, service locations, patient account numbers, and insurance codes. Guidehouse investigated, engaged experts, and cooperated with law enforcement.

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Incident timeline

undetected · 81 days

discovery → filing · 17 weeks / 120 days

Jan 1, 2021

Begins

Mar 23, 2021

Discovered

Jul 21, 2021

Filed

vs. sector median

+5 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed2,081 affectedView incident

Name: GUIDEHOUSE INC.
norm: guidehouse

Name: Logan Health
norm: logan health
Industry: HealthcarellmProfessional Servicesllm

Discovered: Mar 23, 2021
Breach occurred: Jan 1, 2021
Undetected for: 81 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 21, 2021
Affected individuals: 2,081state-resident count only
Data types: PIIIdentity (basic)Financial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified Guidehouse (the client) on May 26, 2021
Third party: via Guidehouse
Initial access: supply_chain

During the incident: Immediately launched an investigation
Ceased using the third-party service that had been compromised
Cooperated with federal law enforcement
Engaged leading cyber security experts in connection with investigating and responding to the incident
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 weeks(120 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/a-notif-101.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 21, 2021
Raw hash: fb5ca60157f79f63f12282a350c286c364da36328a552f7d489d21f743ce4904

Reporting entityGUIDEHOUSE INC.

Victim entityLogan Health

Incidentdiscovered Mar 23, 2021

Stated responseImmediately launched an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov