HackingHealthcareProfessional ServicesHealthcareCustomer Data InvolvedEmployee Data InvolvedPIIIdentity (basic)PHIHealth (basic)LowContained

DELTA DENTAL OF CALIFORNIA

bd_41a6c7fb924f9bae · schema v1 · pii pii-v1

Severity

Low

Discovered

Mar 13, 2023

Filed

Jul 25, 2023

To disclose

19 weeks

Affected

137state residents only

Linked

2 filings

Confidence

65%

Full breach record for DELTA DENTAL OF CALIFORNIA →5 incidents on file

Orrick, Herrington & Sutcliffe, LLP filed a supplemental notice on behalf of Delta Dental of California regarding a March 13, 2023 security event. Unauthorized access to a file share occurred between Feb 28 and Mar 13, 2023, exposing PII and PHI of insureds. 137 NH residents notified. Identity monitoring offered.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 13 days

discovery → filing · 19 weeks / 134 days

Feb 28, 2023

Begins

Mar 13, 2023

Discovered

Jul 25, 2023

Filed

vs. sector median

+7 wks slower

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

California State AGbd_fbc5ee9565b8231c2023-07-20 · +5dCandidate

Name: Orrick, Herrington & Sutcliffe LLP
norm: orrick herrington sutcliffe
Domain: orrick.com

Name: DELTA DENTAL OF CALIFORNIA
norm: delta dental of california
Domain: deltadentalca.com
Industry: HealthcarellmProfessional Servicesllm

Discovered: Mar 13, 2023
Breach occurred: Feb 28, 2023 – Mar 13, 2023
Undetected for: 13 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 20, 2023
Affected individuals: 137state-resident count only
Data types: PIIIdentity (basic)PHIHealth (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Regulator citations: Notified New Hampshire Office of the Attorney General
Initial access: external_remote_services

During the incident: Took steps to block the unauthorized access
Initiated its response process
Launching an investigation of the incident with the support of a third-party forensics firm
Notified law enforcement
Offering complimentary identity monitoring services
Established a dedicated call center
Deployed additional security measures and tools with the guidance of third-party experts
Changes made: Deployed additional security measures and tools with the guidance of third-party experts to strengthen the ongoing security of its network
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 19 weeks(134 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

California State AGJul 20 · first

New Hampshire State AG+5d · this page

Pattern: first filing Jul 20 (CA), last Jul 25 (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://mm.nh.gov/files/uploads/doj/remote-docs/orrick-herrington-sutcliff-20230725.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 25, 2023
Raw hash: 286974df391108da12ef16d91755a6009f68d9e321ea925decac4aa0a02133fd

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityOrrick, Herrington & Sutcliffe LLP

Victim entityDELTA DENTAL OF CALIFORNIA

Incidentdiscovered Mar 13, 2023

Stated responseTook steps to block the unauthorized access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov