HackingHealthcareTechnologyHealthcareVulnerability ExploitData ExfiltratedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDMediumContained

STANFORD HEALTH CARE

bd_d56e175cb47d0837 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 26, 2023

Filed

Nov 21, 2023

To disclose

15 weeks

Affected

6state residents only

Confidence

66%

Full breach record for STANFORD HEALTH CARE →

Welltok, Inc. notified Stanford Health Care and its affiliates of a breach involving the MOVEit Transfer server. An unknown actor exploited software vulnerabilities to access the server on May 30, 2023, and exfiltrated data. Welltok discovered the breach on August 11, 2023, and began notifying approximately 6 New Hampshire residents on November 17, 2023. Response included credit monitoring via Experian and enhanced privacy policies.

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Incident timeline

undetected · 57 days

discovery → filing · 17 weeks / 118 days

May 30, 2023

Begins

Jul 26, 2023

Discovered

Nov 21, 2023

Filed

vs. sector median

+4 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed6 affectedView incident

Name: Welltok
norm: welltok
Domain: welltok.com

Name: STANFORD HEALTH CARE
norm: stanford health care
Industry: HealthcarellmTechnologyllm

Discovered: Jul 26, 2023
Breach occurred: May 30, 2023
Undetected for: 57 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 17, 2023
Affected individuals: 6state-resident count only
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: Launched an additional investigation with the assistance of third-party cybersecurity specialists
Provided access to credit monitoring services for , depending on state law requirements, through Experian, to individuals whose personal information was potentially impacted by this event, at no cost to these individuals
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing individuals with information on how to place fraud alerts and credit freezes on their credit files
Changes made: Reviewing and enhancing our 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: 15 weeks(102 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://mm.nh.gov/files/uploads/doj/remote-docs/welltok-20231121.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 21, 2023
Raw hash: 7ac81bbb93badd89b79037713c18f97fdee5a5f9cedb3a86d0e5b494096b2e10

Reporting entityWelltok

Victim entitySTANFORD HEALTH CARE

Incidentdiscovered Jul 26, 2023

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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov