Social EngineeringHealthcareHealthcarePhishingStolen CredentialsCustomer Data InvolvedTargetedPHIHealth (basic)Identity (basic)LowContained

WELLSTAR HEALTH SYSTEM, INC.

bd_69cd6086a9112118 · schema v1 · pii pii-v1

Severity

Low

Discovered

Feb 7, 2022

Filed

Apr 8, 2022

To disclose

9 weeks

Affected

1state residents only

Linked

2 filings

Confidence

66%

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

WellStar Health System, Inc. notified affected individuals of a phishing attack that compromised employee email accounts. The incident occurred between Dec 6, 2021 and Jan 3, 2022. The attacker accessed PHI including names, medical record numbers, and lab results. No SSN or financial data was accessed. WellStar disabled accounts, reset passwords, and engaged forensic investigators.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 63 days

discovery → filing · 9 weeks / 60 days

Dec 6, 2021

Begins

Feb 7, 2022

Discovered

Apr 8, 2022

Filed

vs. sector median

on median

This filing is one of 2 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

HHS OCRbd_0788e2944411325f2022-04-08Verified

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

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

Discovered: Feb 7, 2022
Breach occurred: Dec 6, 2021 – Jan 3, 2022
Undetected for: 63 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: PHIHealth (basic)Identity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: External
Initial access: phishing_link

During the incident: Disabled the impacted email accounts
Required mandatory password resets
Commenced a thorough investigation
Worked very closely with external cybersecurity professionals
Conducted a comprehensive forensic investigation and manual document review
Changes made: Implemented additional technical safeguards on our email system
Implemented additional training and education for our employees to increase awareness of the risks of malicious emails
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(60 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

HHS OCRApr 8 · first

Montana State AGApr 8 · first · this page

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-299.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 8, 2022
Raw hash: ba541045885a60e3267abccf7aace2fc893715604f79dea5698591a80576ae11

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityWELLSTAR HEALTH SYSTEM, INC.

Victim entityWELLSTAR HEALTH SYSTEM, INC.

Incidentdiscovered Feb 7, 2022

Stated responseDisabled the impacted email accounts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov