Social EngineeringHealthcareFinancial ServicesHealthcarePhishingStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)Government IDFinancial accountMediumContained

Delta Dental of Illinois

bd_0c762bd4d8decd2b · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 1, 2019

Filed

May 6, 2019

To disclose

9 weeks

Affected

9state residents only

Linked

5 filings

Confidence

66%

Full breach record for Delta Dental of Illinois →2 incidents on file

Delta Dental of Illinois notified the NH AG of a phishing incident where an employee's email credentials were stolen. Unauthorized access occurred Dec 21-28, 2018. Impacted data included names, DOBs, SSNs, and insurance info. 9 NH residents affected. Notices mailed April 16, 2019, offering 1 year of identity protection.

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Incident timeline

undetected · 70 days

discovery → filing · 9 weeks / 66 days

Dec 21, 2018

Begins

Mar 1, 2019

Discovered

May 6, 2019

Filed

vs. sector median

3 wks faster

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

HHS OCRbd_ce29f0bcf8c00ae72019-04-17 · +19dVerified
Massachusetts State AGbd_258f4aa6c15cd8622019-04-16 · +20dVerified
HHS OCRbd_d5bbe0a6ab70d39e2019-04-16 · +20dVerified
Montana State AGbd_f13df91283edabd52019-04-16 · +20dVerified

Name: Cooley LLP
norm: cooley

Name: Delta Dental of Illinois
norm: delta dental of illinois
Domain: deltadentalil.com
Industry: HealthcarellmFinancial Servicesllm

Discovered: Mar 1, 2019
Breach occurred: Dec 21, 2018 – Dec 28, 2018
Undetected for: 70 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 16, 2019
Affected individuals: 9state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney General
Initial access: phishing_link

During the incident: Initiating an internal investigation
Disabling the affected user account
Retaining a top forensic investigator to assist in the investigation
Contacted law enforcement
Reset employee account passwords
Changes made: Implementing additional email security tools designed to help prevent this type of incident from reoccurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(66 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 4 states

View merged incident ↗

Massachusetts State AGApr 16 · first

HHS OCRApr 16 · first

Montana State AGApr 16 · first

HHS OCR+1d

New Hampshire State AG+20d · this page

Pattern: first filing Apr 16 (MA), last May 6 (NH) — a 20-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/delta-dental-of-illinois-20190506.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 6, 2019
Raw hash: 87ab18a97a4c3dfea19c6f5c3dca941d9cf69860a24c6c76b74f6b2fb02df67e

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityCooley LLP

Victim entityDelta Dental of Illinois

Incidentdiscovered Mar 1, 2019

Stated responseInitiating an internal investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov