HackingHealthcareTechnologyHealthcareVulnerability ExploitCapture Stored DataZero-DayData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHighContained

United HealthCare Services, Inc.

bd_84570591e780e238 · schema v1 · pii pii-v1

Severity

High

Discovered

Jul 26, 2023

Filed

Dec 22, 2023

To disclose

21 weeks

Affected

9,938state residents only

Linked

2 filings

Confidence

69%

Full breach record for United HealthCare Services, Inc. →29 incidents on file

United Healthcare Services, Inc. (Welltok) reported a supplemental data event to Washington AG. An unknown actor exploited a zero-day vulnerability in MOVEit Transfer software to access the server on May 30-31, 2023, and exfiltrated data. Welltok detected the compromise on July 26, 2023. Data included names, addresses, DOBs, and Medicaid IDs. 9,938 Washington residents were notified on Dec 22, 2023. Credit monitoring offered.

J jump to incidentP pin to compareR raw source

Washington clock✗ WA AG >90d21 weeks discovery → filing

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

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

HHS OCRbd_55de07364a6904802023-12-08 · +14dCandidate

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: United HealthCare Services, Inc.
norm: united healthcare
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: 9,938state-resident count only
Data types: Identity (basic)Government ID
Data elements: NameDate of birth
WA-stated cause: Cyberattack
WA-stated duration: lifecycle Unknowndexposure Unknownd
WA-stated discovery: Found after the fact
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Filed supplemental notice with Washington State Office of the Attorney General
Initial access: exploit_public_facing

During the incident: Launched an additional investigation with the assistance of third-party cybersecurity specialists
Providing access to credit monitoring services for twelve (12) to twenty-four (24) months... through Experian
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Changes made: Reviewing and enhancing its 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: WA AG >90d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

HHS OCRDec 8 · first

Washington State AG+14d · this page

Pattern: first filing Dec 8 (CT), last Dec 22 (WA) — a 14-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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachM16398.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: a33ce834d9f68daa3587f766563e18b5167f2ec244dd2678634683e695ed8d80

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityUnited HealthCare Services, Inc.

Incidentdiscovered Jul 26, 2023

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

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com