HackingHealthcareTechnologyHealthcareVulnerability ExploitData ExfiltratedSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Health (basic)PHILowContained

Welltok

bd_b765e398c9850ca1 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 26, 2023

Filed

Dec 15, 2023

To disclose

20 weeks

Affected

Not disclosed

Linked

22 filings

Confidence

65%

Full breach record for Welltok →3 incidents on file

Welltok, Inc. disclosed that an unknown actor exploited software vulnerabilities in its MOVEit Transfer server on May 30, 2023, exfiltrating data including names, dates of birth, phone numbers, treatment/diagnosis information, prescription information, provider names, medical record numbers, and health insurance information. The company was alerted to the compromise on July 26, 2023, and confirmed the breach on August 11, 2023. Welltok engaged third-party cybersecurity specialists, reconstructed systems, and is offering 12 months of credit monitoring via Experian to affected individuals. The incident impacts residents of California and Rhode Island, among others.

J jump to incidentP pin to compareR raw source

California clockDiscovered Jul 26, 2023 → Notified Dec 14, 2023141d ✗ CA 60-day late20 weeks discovery → filing

Incident timeline

undetected · 57 days

discovery → filing · 20 weeks / 142 days

May 30, 2023

Begins

Jul 26, 2023

Discovered

Dec 15, 2023

Filed

vs. sector median

+11 wks slower

This filing is one of 22 filings 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 (10) · sorted by filing gap

Maine State AGbd_063b1deb8c7a2bff2023-12-15Verified by operator
Vermont State AGbd_69d99adc86ef4dcf2023-12-15Verified
New Hampshire State AGbd_e5a605be617ae3962023-12-15Verified
Maine State AGbd_0328ea1fdab9c4592023-12-22 · +7dVerified by operator

Show 6 more filings ↓up to 161d gap

California State AGbd_5e4b7107bd1176de2023-12-22 · +7dVerified
Vermont State AGbd_8ca9e17ac4dfbe9b2023-12-22 · +7dVerified
New Hampshire State AGbd_db6e6d3e58b51e902023-12-22 · +7dVerified
California State AGbd_cf54a7692c42c7aa2024-01-08 · +24dVerified by operator
California State AGbd_d2c5cdddd25b96d92024-02-28 · +75dVerified by operator
South Carolina State AGbd_57aa66e4578bd8912024-05-24 · +161dVerified by operator

Showing first 10 of 21 linked disclosures.

Name: Welltok
norm: welltok
Domain: welltok.com

Name: Welltok
norm: welltok
Domain: welltok.com
Industry: HealthcarellmTechnologyllm

Discovered: Jul 26, 2023
Breach occurred: May 30, 2023
Undetected for: 57 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 14, 2023
Affected individuals: Not disclosed
Data types: Identity (basic)Health (basic)PHI
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: External
Initial access: exploit_public_facing

During the incident: Launched an additional investigation with the assistance of third-party cybersecurity specialists
Conducted a full reconstruction of systems and historical data
Reviewed and enhanced existing policies and procedures related to data privacy
Notified potentially affected individuals
Offering 12 months of credit monitoring and identity protection services provided by Experian
Changes made: Reviewing and enhancing existing policies and procedures related to data privacy to reduce the likelihood of a similar future event
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 20 weeks(142 days from discovery to filing)
Compliance flags: CA 60-day late · 141d
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: Jul 26, 2023
→ Notified: Dec 14, 2023
141d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Jul 26, 2023 → Notified: Dec 14, 2023	141d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 5 states

View merged incident ↗

Maine State AGDec 15 · first

Vermont State AGDec 15 · first

New Hampshire State AGDec 15 · first

California State AGDec 15 · first · this page

Maine State AG+7d

California State AG+7d

Vermont State AG+7d

New Hampshire State AG+7d

California State AG+24d

California State AG+75d

South Carolina State AG+161d

Pattern: first filing Dec 15 (ME), last May 24 (SC) — a 161-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 21 — the full spread may be wider.

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/sb24-578029
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 15, 2023
Raw hash: 944d8fd1d116bf34bc38d9ed6df5c48161dca58c207c4e8846fa7e3d6dc78307

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityWelltok

Victim entityWelltok

Incidentdiscovered Jul 26, 2023

Stated responseLaunched an additional investigation with the assistance of third-party cybersecurity specialists

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov