HackingHealthcareFinancial ServicesHealthcareVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedZero-DayPIIPHIIdentity (basic)Health (basic)LowContained

Delta Dental of California and affiliates

bd_84d913a18ea5d62d · schema v1 · pii pii-v1

Severity

Low

Discovered

Jun 1, 2023

Filed

Jan 31, 2024

To disclose

35 weeks

Affected

Not disclosed

Linked

6 filings

Confidence

64%

Delta Dental of California and affiliates experienced a data security incident involving the MOVEit Transfer software from Progress Software. Unauthorized actors exploited a previously unknown vulnerability in the software, accessing and acquiring data between May 27 and May 30, 2023. The company discovered the incident on June 1, 2023. Affected data includes personal and health information. The company engaged forensic experts, notified law enforcement, and is offering 24 months of identity monitoring.

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Incident timeline

undetected · 5 days

discovery → filing · 35 weeks / 244 days

May 27, 2023

Begins

Jun 1, 2023

Discovered

Jan 31, 2024

Filed

vs. sector median

+22 wks slower

This filing is one of 6 about the same incident.View merged incident

Part of Progress Software Corporation supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

California State AGbd_3928b2315b9e54502024-02-07 · +7dCandidate
New Hampshire State AGbd_9e88312a77fdbd762024-01-24 · +7dVerified
Vermont State AGbd_f9dd9d8c0025c2d42024-02-09 · +9dVerified
California State AGbd_ed716715756a40722024-03-14 · +43dVerified

Show 1 more filing ↓up to 48d gap

California State AGbd_b7d1eba67d9b03252023-12-14 · +48dCandidate

Name: Delta Dental of California and affiliates
norm: delta dental of california
Domain: www1.deltadentalins.com

Name: Delta Dental of California and affiliates
norm: delta dental of california
Domain: www1.deltadentalins.com
Industry: HealthcarellmFinancial Servicesllm

Discovered: Jun 1, 2023
Breach occurred: May 27, 2023 – May 30, 2023
Undetected for: 5 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PIIPHIIdentity (basic)Health (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified law enforcement
Initial access: exploit_public_facing

During the incident: Launched a thorough investigation
Stopped access to the MOVEit software
Removed the malicious files
Conducted a thorough analysis of the MOVEit database
Applied the recommended patches
Reset administrative passwords to the MOVEit system
Enhanced unauthorized access monitoring related to MOVEit Transfer file access, malicious activity, and ransomware activity
Engaged independent third-party experts in computer forensics, analytics, and data mining
Notified law enforcement of the incident and have been cooperating with them
Changes made: Offering 24 months of free identity monitoring services through Kroll
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 35 weeks(244 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 3 states

View merged incident ↗

California State AGDec 14 · first

New Hampshire State AG+41d

California State AG+48d · this page

California State AG+55d

Vermont State AG+57d

California State AG+91d

Pattern: first filing Dec 14 (CA), last Mar 14 (CA) — a 91-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/sb24-580275
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 31, 2024
Raw hash: 160d9bec23a0f3896c969e5e683941f8acbd420d10ef825fdbe312911d64b4e8

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityDelta Dental of California and affiliates

Victim entityDelta Dental of California and affiliates

Incidentdiscovered Jun 1, 2023

Stated responseLaunched a thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov