HackingHealthcareFinancial ServicesHealthcareVulnerability ExploitStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedBusiness Associate (HIPAA)PHIHealth (basic)Identity (basic)LowContained

Blue Shield of California

bd_6beb8ba0bda9123f · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 23, 2023

Filed

Nov 17, 2023

To disclose

12 weeks

Affected

Not disclosed

Linked

3 filings

Confidence

66%

Blue Shield of California notified members that a contracted vendor managing vision benefits was compromised in the global MOVEit data security incident. An unauthorized third party exploited an unknown vulnerability in the MOVEit server to exfiltrate information on May 28 and May 31, 2023. The vendor discovered the breach on August 23, 2023. Affected data may include member eligibility, authorized third parties, and vision claims processing information. Blue Shield is offering complimentary credit monitoring and identity restoration services through Kroll.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 87 days

discovery → filing · 12 weeks / 86 days

May 28, 2023

Begins

Aug 23, 2023

Discovered

Nov 17, 2023

Filed

vs. sector median

on median

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

HHS OCRbd_4f096d3a71532eca2023-11-17Verified
New Hampshire State AGbd_57de58eb876f18d72023-11-22 · +5dVerified

Name: Blue Shield of California
norm: blue shield of california
Domain: blueshieldca.com

Name: Blue Shield of California
norm: blue shield of california
Domain: blueshieldca.com
Industry: HealthcarellmFinancial Servicesllm

Discovered: Aug 23, 2023
Breach occurred: May 28, 2023 – May 31, 2023
Undetected for: 87 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PHIHealth (basic)Identity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 ChannelT1195 Supply Chain Compromise
Threat actor: External
Regulator citations: Reported the matter to the FBI
Third party: via Contracted vendor managing vision benefits
Initial access: supply_chain

During the incident: Vendor took the server offline
Vendor launched an investigation into the incident
Vendor engaged a cybersecurity firm
Vendor reported the matter to the FBI
Vendor rebuilt the MOVEit system in accordance with gold standard build requirements
Vendor undertook technical measures to validate security controls
Offering complimentary credit monitoring and identity restoration services through Kroll
Changes made: Rebuilt the MOVEit system in accordance with gold standard build requirements
Validated security controls put in place before reactivating the system
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 12 weeks(86 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 · 2 states

View merged incident ↗

HHS OCRNov 17 · first

California State AGNov 17 · first · this page

New Hampshire State AG+5d

Pattern: first filing Nov 17 (CA), last Nov 22 (NH) — a 5-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/sb24-576743
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 17, 2023
Raw hash: f21decc8ecdb3c9446f1dad7e0c575318298d905ff22421c2635f01de634d0b5

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityBlue Shield of California

Victim entityBlue Shield of California

Incidentdiscovered Aug 23, 2023

Stated responseVendor took the server offline

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov