HackingHealthcareHealthcareVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)PIILowContained

WELLSTAR HEALTH SYSTEM, INC.

bd_502c2078d2a3ffaf · schema v1 · pii pii-v1

Severity

Low

Discovered

Jan 2, 2024

Filed

Jun 20, 2024

To disclose

24 weeks

Affected

1state residents only

Confidence

66%

Full breach record for WELLSTAR HEALTH SYSTEM, INC. →4 incidents on file

Wellstar Health System notified Montana residents of a data breach involving PHI and PII. The incident resulted from a third-party vendor (Philips Respironics) exploiting a MOVEit Transfer vulnerability. Data accessed included patient names, addresses, DOBs, and insurance IDs. Wellstar suspended the tool and offered 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 216 days

discovery → filing · 24 weeks / 170 days

May 31, 2023

Begins

Jan 2, 2024

Discovered

Jun 20, 2024

Filed

vs. sector median

+15 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: WELLSTAR HEALTH SYSTEM, INC.
norm: wellstar health system

Name: WELLSTAR HEALTH SYSTEM, INC.
norm: wellstar health system
Industry: Healthcarellm

Discovered: Jan 2, 2024
Breach occurred: May 31, 2023
Undetected for: 216 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: Identity (basic)PII
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Third party: via Philips Respironics
Initial access: exploit_public_facing

During the incident: Use of the MOVEit Transfer tool has been suspended
Continuing to work to ensure all appropriate security measures are in place to safeguard your personal information
Offering complimentary one-year membership to Experian’s Identity Works services
Changes made: Offering complimentary one-year membership to Experian’s Identity Works services, which include credit monitoring and identity restoration services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 24 weeks(170 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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-1495.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 20, 2024
Raw hash: b778cec7e9b335965ba869d440276706674433d9977792a14a412fe0f7534522

Reporting entityWELLSTAR HEALTH SYSTEM, INC.

Victim entityWELLSTAR HEALTH SYSTEM, INC.

Incidentdiscovered Jan 2, 2024

Stated responseUse of the MOVEit Transfer tool has been suspended

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov