Social EngineeringHealthcareFinancial ServicesHealthcarePhishingBECRansom DemandedCustomer Data InvolvedMulti-Stage ChainPIIIdentity (basic)Financial accountLowContained

Highmark Inc

bd_a365b348cac7fe2b · schema v1 · pii pii-v1

Severity

Low

Discovered

Jan 27, 2021

Filed

Jun 24, 2021

To disclose

21 weeks

Affected

63state residents only

Linked

3 filings

Confidence

66%

Full breach record for Highmark Inc →8 incidents on file

MultiPlan Inc., a vendor for Highmark Inc., notified Highmark members in Montana that an outside bad actor gained unauthorized access to an employee's email account between Dec 23, 2020 and Jan 27, 2021. The actor attempted to divert wire payments (BEC) and accessed personal information within billing communications. MultiPlan terminated access, reset credentials, engaged forensic experts, and reported to law enforcement. Affected individuals were offered two years of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 35 days

discovery → filing · 21 weeks / 148 days

Dec 23, 2020

Begins

Jan 27, 2021

Discovered

Jun 24, 2021

Filed

vs. sector median

+9 wks slower

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

California State AGbd_b0ec3199cadaa20c2021-06-24Verified
Indiana State AGbd_21a8a59a4c1d36b62021-06-30 · +6dVerified

Name: MultiPlan, Inc.
norm: multiplan

Name: Highmark Inc
norm: highmark
Domain: highmark.com
Industry: HealthcarellmFinancial Servicesllm

Discovered: Jan 27, 2021
Breach occurred: Dec 23, 2020 – Jan 27, 2021
Undetected for: 35 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 63state-resident count only
Data types: PIIIdentity (basic)Financial account
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: Reported to law enforcement
Initial access: phishing_link

During the incident: Terminated the unauthorized access
Changed the employee’s credentials
Commenced an investigation supported by forensics experts
Reported the matter to law enforcement
Arranged for an offer of credit monitoring at no cost to you for a period of two years
Changes made: Reinforced email authentication requirements
Provided additional training to employees
Increased phishing campaign training
Engaged a third party security firm to conduct a thorough analysis of our information security policies, procedures and controls
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 21 weeks(148 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 ↗

California State AGJun 24 · first

Montana State AGJun 24 · first · this page

Indiana State AG+6d

Pattern: first filing Jun 24 (CA), last Jun 30 (IN) — a 6-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/OCP/a-notif-19.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 24, 2021
Raw hash: 2e340aaae82f8ca76798ac1d57f6bfd0d1c20ad28d77c81192faf56953faecb0

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMultiPlan, Inc.

Victim entityHighmark Inc

Incidentdiscovered Jan 27, 2021

Stated responseTerminated the unauthorized access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov