Social EngineeringHealthcareTechnologyHealthcarePhishingStolen CredentialsCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDFinancial accountPIIMediumContained

Adelanto HealthCare Ventures

bd_e098fbe99c13e7cc · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 6, 2021

Filed

Oct 21, 2022

To disclose

50 weeks

Affected

1state residents only

Confidence

65%

Full breach record for Adelanto HealthCare Ventures →

Adelanto HealthCare Ventures (AHCV) notified Montana residents that two employee email accounts were compromised via phishing on November 6-7, 2021. The attacker used the accounts to send further phishing emails. While no personal information was confirmed obtained, accessed accounts may have contained PII, SSNs, and financial data. AHCV engaged forensic investigators, reset credentials, and offered 12 months of identity protection services.

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Incident timeline

discovery → filing · 50 weeks / 349 days

Nov 6, 2021

Begins

Nov 6, 2021

Discovered

Oct 21, 2022

Filed

vs. sector median

+39 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: Adelanto HealthCare Ventures
norm: adelanto healthcare

Name: Adelanto HealthCare Ventures
norm: adelanto healthcare
Industry: HealthcarellmTechnologyllm

Discovered: Nov 6, 2021
Breach occurred: Nov 6, 2021 – Nov 7, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 21, 2022
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDFinancial accountPII
Data elements: Social Security numberDate of birth
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Instructed employees to change their passwords
Retained a cybersecurity forensics firm to help us investigate the incident
Changes made: Implemented additional security measures designed to prevent a recurrence of such an attack
Offering identity theft protection services through IDX
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 50 weeks(349 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/Consumer-Notification-Letter-632.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 21, 2022
Raw hash: 89ffa52cfd8fdec68433ea3e4bfd601ad0893432a02b651e5fa2d6afdf3e7f6e

Reporting entityAdelanto HealthCare Ventures

Victim entityAdelanto HealthCare Ventures

Incidentdiscovered Nov 6, 2021

Stated responseInstructed employees to change their passwords

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov