HackingHealthcareTechnologyHealthcareVulnerability ExploitZero-DaySupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedPHIHealth (basic)Identity (basic)MediumContained

UNITEDHEALTHCARE INSURANCE COMPANY

bd_aef3b212d1539ec8 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 26, 2023

Filed

Dec 22, 2023

To disclose

21 weeks

Affected

Not disclosed

Confidence

65%

Full breach record for UNITEDHEALTHCARE INSURANCE COMPANY →33 incidents on file

Welltok, Inc. notified UnitedHealthcare members in Delaware of a data breach involving the exploitation of a zero-day vulnerability in Progress Software's MOVEit Transfer tool. The incident occurred between May 30-31, 2023, resulting in the exfiltration of member data including names, addresses, Member IDs, DOBs, and Medicaid IDs. Welltok engaged third-party forensic specialists and is offering 24 months of credit monitoring via Experian.

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Incident timeline

undetected · 57 days

discovery → filing · 21 weeks / 149 days

May 30, 2023

Begins

Jul 26, 2023

Discovered

Dec 22, 2023

Filed

vs. sector median

+9 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: Welltok
norm: welltok
Domain: welltok.com

Name: UNITEDHEALTHCARE INSURANCE COMPANY
norm: unitedhealthcare insurance
Domain: uhc.com
Industry: HealthcarellmTechnologyllm

Discovered: Jul 26, 2023
Breach occurred: May 30, 2023 – May 31, 2023
Undetected for: 57 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 22, 2023
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: exploit_public_facing

During the incident: Initiated an investigation with the assistance of third-party cybersecurity specialists
Worked with third-party forensics specialists to reconstruct and analyze the impacted data
Providing you with access to 24-months of free credit monitoring and identity protection services provided by Experian
Changes made: Reviewing and enhancing our existing policies and procedures related to data privacy
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 21 weeks(149 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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://attorneygeneral.delaware.gov/wp-content/uploads/sites/50/2024/01/Welltok-December-22-2023.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 22, 2023
Raw hash: a0fba25cfe09f0fec3bd9a4f4b1d33643ee0cd45bc57f32a6a285bc76d93d149

Reporting entityWelltok

Victim entityUNITEDHEALTHCARE INSURANCE COMPANY

Incidentdiscovered Jul 26, 2023

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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceattorneygeneral.delaware.gov