MalwareHealthcareHealthcareRansomwareCapture Stored DataData ExfiltratedData EncryptedCustomer Data InvolvedTargetedPHIHealth (basic)Identity (basic)LowContained

Dignity Health Lassen Medical Clinic

bd_482a2bfb49fd2893 · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 20, 2024

Filed

Mar 25, 2025

To disclose

27 weeks

Affected

Not disclosed

Linked

3 filings

Confidence

65%

Full breach record for Dignity Health Lassen Medical Clinic →2 incidents on file

Dignity Health Lassen Medical Clinics (Red Bluff and Cottonwood, CA) reported a cyber event on Sept 20, 2024. Unauthorized access occurred Sept 17-20, 2024. Patient PHI was accessed/exfiltrated. Kroll identity monitoring offered. Investigation conducted with external forensics vendor.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 3 days

discovery → filing · 27 weeks / 186 days

Sep 17, 2024

Begins

Sep 20, 2024

Discovered

Dec 3, 2024

Scope determined

Mar 25, 2025

Filed

vs. sector median

+14 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Maine State AGbd_259071aa527182d92025-03-25Candidate
California State AGbd_b763680e2e4a373f2025-03-25Verified

Name: Dignity Health Lassen Medical Clinic
norm: dignity health lassen medical clinic

Name: Dignity Health Lassen Medical Clinic
norm: dignity health lassen medical clinic
Industry: Healthcarellm

Discovered: Sep 20, 2024
Breach occurred: Sep 17, 2024 – Sep 20, 2024
Undetected for: 3 daysoccurrence → discovery
Materiality determined: Dec 3, 2024
Notification sent: —
Affected individuals: Not disclosed
Data types: PHIHealth (basic)Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 ChannelT1119 Automated Collection
Threat actor: ExternalFinancial

During the incident: Temporarily disabled IT network
Restored network
Took steps to secure its network
Began an investigation with the assistance of an external forensics vendor
Secured the services of Kroll to provide identity monitoring
Changes made: Returned systems to the network with additional security and monitoring tools
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 27 weeks(186 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Maine State AGMar 25 · first

California State AGMar 25 · first

New Hampshire State AGMar 25 · 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://mm.nh.gov/files/uploads/doj/remote-docs/dignity-health-lassen-medical-clinic-red-bluff-cottonwood-20250325.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 25, 2025
Raw hash: 8217e3d9dd6a2e85c6fcb40278e7d35ed3402620a9dfa985f7d61961ab52ddb7

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityDignity Health Lassen Medical Clinic

Victim entityDignity Health Lassen Medical Clinic

Incidentdiscovered Sep 20, 2024

Stated responseTemporarily disabled IT network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov