Social EngineeringHealthcareHealthcarePhishingTargetedPHIHealth (basic)Identity (basic)Financial accountMediumContained

Highmark Inc

bd_f08d1e5c8ae3fa0f · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 15, 2022

Filed

Feb 7, 2023

To disclose

8 weeks

Affected

1,693state residents only

Linked

10 filings

Confidence

64%

Full breach record for Highmark Inc →8 incidents on file

Highmark Health notified individuals of a phishing incident where an employee's email was compromised between Dec 13-15, 2022. The attacker accessed emails containing PHI, including names, enrollment info, claims data, and financial info. Highmark shut down the mailbox, reset passwords, and offered 24 months of Experian IdentityWorks.

J jump to incidentP pin to compareR raw source

South Carolina clock✓ SC CRA notice due8 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 2 days

discovery → filing · 8 weeks / 54 days

Dec 13, 2022

Begins

Dec 15, 2022

Discovered

Feb 7, 2023

Filed

vs. sector median

5 wks faster

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

Washington State AGbd_942a588b7d88d2c32023-02-06 · +1dVerified
HHS OCRbd_67a2105beb6464002023-02-10 · +3dVerified
HHS OCRbd_979c36a1443ad8f12023-02-10 · +3dVerified
Indiana State AGbd_b1db1c0f4716a2872023-02-10 · +3dVerified

Show 5 more filings ↓up to 139d gap

Delaware State AGbd_b2b69efe74984e652023-02-10 · +3dVerified
California State AGbd_e3ddb304e00287ca2023-02-03 · +4dCandidate
Maine State AGbd_f75581b2eb9ebe572023-02-03 · +4dVerified
Delaware State AGbd_9b2ceab0938674db2023-02-15 · +8dVerified
New Hampshire State AGbd_445a421e449e6ca32023-06-26 · +139dVerified

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

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

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: 1,693state-resident count only
Data types: PHIHealth (basic)Identity (basic)Financial account
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: External
Initial access: phishing_link

During the incident: The mailbox was immediately shut down
Network blocking was implemented
Passwords were reset
The enterprise will continue to enhance email security controls
Additional training and education has been provided to employees
Changes made: Enhance email security controls
Additional training and education has been provided to employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(54 days from discovery to filing)
Compliance flags: SC CRA notice due
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

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 · this page

HHS OCR+7d

Indiana State AG+7d

Delaware State AG+7d

Delaware State AG+12d

New Hampshire State AG+143d

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://consumer.sc.gov/sites/consumer/files/Documents/Business%20Resources%20Laws/Related%20Laws/Breaches/2023/HighmarkHealth.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 7, 2023
Raw hash: 892ccb9633236817eebbc1d380c56016b12d53c6615e7c94f8f1c9029f6eba93

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityHighmark Inc

Victim entityHighmark Inc

Incidentdiscovered Dec 15, 2022

Stated responseThe mailbox was immediately shut down

ComplianceSC CRA notice due

Extraction provenanceno artifact recorded

Source provenanceconsumer.sc.gov