Social EngineeringHealthcareFinancial ServicesHealthcarePhishingStolen CredentialsCustomer Data InvolvedMulti-Stage ChainPHIIdentity (basic)Government IDMediumContained

Highmark Inc

bd_445a421e449e6ca3 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 15, 2022

Filed

Jun 26, 2023

To disclose

28 weeks

Affected

696state residents only

Linked

10 filings

Confidence

66%

Full breach record for Highmark Inc →8 incidents on file

Highmark Health reported a phishing incident where an employee's email account was compromised between Dec 13-15, 2022. The attacker accessed emails containing PHI and PII (name, SSN) of 696 NH residents. Highmark shut down the mailbox, reset passwords, and engaged forensic consultants. Notices were sent to affected individuals and regulators on Feb 13, 2023.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 2 days

discovery → filing · 28 weeks / 193 days

Dec 13, 2022

Begins

Dec 15, 2022

Discovered

Jun 26, 2023

Filed

vs. sector median

+15 wks slower

This filing is one of 10 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

Delaware State AGbd_9b2ceab0938674db2023-02-15 · +131dVerified
HHS OCRbd_67a2105beb6464002023-02-10 · +136dVerified
HHS OCRbd_979c36a1443ad8f12023-02-10 · +136dVerified
Indiana State AGbd_b1db1c0f4716a2872023-02-10 · +136dVerified

Show 5 more filings ↓up to 143d gap

Delaware State AGbd_b2b69efe74984e652023-02-10 · +136dVerified
South Carolina State AGbd_f08d1e5c8ae3fa0f2023-02-07 · +139dVerified
Washington State AGbd_942a588b7d88d2c32023-02-06 · +140dVerified
California State AGbd_e3ddb304e00287ca2023-02-03 · +143dCandidate
Maine State AGbd_f75581b2eb9ebe572023-02-03 · +143dVerified

Name: Highmark Inc
norm: highmark
Domain: highmark.com

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

Discovered: Dec 15, 2022
Breach occurred: Dec 13, 2022 – Dec 15, 2022
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Feb 13, 2023
Affected individuals: 696state-resident count only
Data types: PHIIdentity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: issued appropriate regulatory notices to the Department of Health and Humans Services (HHS), state attorney general, and other regulatory agencies
Initial access: phishing_link

During the incident: Shut down the mailbox
Implemented network blocking
Reset passwords
Engaged an external consulting firm that analyzed the contents of the email box
Changes made: Pursuing additional phishing prevention, detection, and response solutions
Employees will receive additional cyber security training and education
Enterprise will continue to enhance email security controls
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 28 weeks(193 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 8 states

View merged incident ↗

California State AGFeb 3 · first

Maine State AGFeb 3 · first

Washington State AG+3d

South Carolina State AG+4d

HHS OCR+7d

Indiana State AG+7d

Delaware State AG+7d

Delaware State AG+12d

New Hampshire State AG+143d · this page

Pattern: first filing Feb 3 (CA), last Jun 26 (NH) — a 143-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://mm.nh.gov/files/uploads/doj/remote-docs/highmark-health-20230626.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 26, 2023
Raw hash: a9f6b6743525dd0d26e93dbb842fb5f8604f8ba94b38754da877cc6a428f49c1

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityHighmark Inc

Victim entityHighmark Inc

Incidentdiscovered Dec 15, 2022

Stated responseShut down the mailbox

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov