Social EngineeringHealthcareFinancial ServicesHealthcarePhishingStolen CredentialsCustomer Data InvolvedEmployee Data InvolvedPHIGovernment IDIdentity (basic)Health (basic)FinancialMediumContained

Highmark Inc

bd_e3ddb304e00287ca · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 15, 2022

Filed

Feb 3, 2023

To disclose

7 weeks

Affected

Not disclosed

Linked

10 filings

Confidence

64%

Full breach record for Highmark Inc →8 incidents on file

Highmark disclosed a cyber security incident where an employee clicked a malicious email link, leading to email account compromise between Dec 13-15, 2022. Protected health information (PHI), including names, SSNs (for some), and treatment info, was potentially accessed. Highmark shut down the mailbox, reset passwords, and offered 24 months of Experian IdentityWorks.

J jump to incidentP pin to compareR raw source

California clockDiscovered Dec 15, 2022 → Notified Feb 13, 202360d ✓ CA 60-day OK7 weeks discovery → filing

Incident timeline

undetected · 2 days

discovery → filing · 7 weeks / 50 days

Dec 13, 2022

Begins

Dec 15, 2022

Discovered

Feb 3, 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

Maine State AGbd_f75581b2eb9ebe572023-02-03Verified
Washington State AGbd_942a588b7d88d2c32023-02-06 · +3dVerified
South Carolina State AGbd_f08d1e5c8ae3fa0f2023-02-07 · +4dVerified
HHS OCRbd_67a2105beb6464002023-02-10 · +7dVerified

Show 5 more filings ↓up to 143d gap

HHS OCRbd_979c36a1443ad8f12023-02-10 · +7dVerified
Indiana State AGbd_b1db1c0f4716a2872023-02-10 · +7dVerified
Delaware State AGbd_b2b69efe74984e652023-02-10 · +7dVerified
Delaware State AGbd_9b2ceab0938674db2023-02-15 · +12dVerified
New Hampshire State AGbd_445a421e449e6ca32023-06-26 · +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: Not disclosed
Data types: PHIGovernment IDIdentity (basic)Health (basic)Financial
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 in regard to the Cyber Security Incident to make them aware and help prevent future Cyber/Phishing attempts in the future
Changes made: The enterprise will continue to enhance email security controls
Additional training and education has been provided to employees in regard to the Cyber Security Incident to make them aware and help prevent future Cyber/Phishing attempts in the future
Offering complimentary access to Experian IdentityWorksSM for 24 months at no cost to you
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(50 days from discovery to filing)
Compliance flags: CA 60-day OK · 60d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Dec 15, 2022
→ Notified: Feb 13, 2023
60d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Dec 15, 2022 → Notified: Feb 13, 2023	60d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 8 states

View merged incident ↗

Maine State AGFeb 3 · first

California State AGFeb 3 · first · this page

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

Pattern: first filing Feb 3 (ME), 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://oag.ca.gov/ecrime/databreach/reports/sb24-562696
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 3, 2023
Raw hash: 79a59ccbd5086738db70b1d4780875567696db0f598e20c94e89ded4710ecdfd

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

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov