MalwarePIIIdentity (basic)LowContained

Cookeville Regional Medical Center

bd_5d9fc57dfb8b5a63 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 14, 2025

Filed

Apr 14, 2026

To disclose

—

Affected

Not disclosed

Linked

6 filings

Confidence

64%

Full breach record for Cookeville Regional Medical Center →3 incidents on file

Cookeville Regional Medical Center notified Nebraska AG of a ransomware attack discovered July 14, 2025. Unauthorized access occurred July 11-14, 2025. Files containing personal information were accessed. The company engaged forensic investigators and law enforcement, secured systems, and offered one year of Experian IdentityWorks credit monitoring to affected individuals.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d

Incident timeline

undetected · 3 days

Jul 11, 2025

Begins

Jul 14, 2025

Discovered

Apr 14, 2026

Filed

This filing is one of 6 about the same incident.View merged incident

A leak claim by rhysida about this victim predates this filing by 275 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (2)

Leak Siterhysidabd_de82a746a3abaa1b2025-08-02 · +255dVerified by operator
Leak Siterhysidabd_0f974ae893d487682025-07-13 · +275dVerified by operator

Regulatory filings (3) · sorted by filing gap

Maine State AGbd_276e5eca9296aab32026-04-14Verified
Massachusetts State AGbd_483d2de112ba28a82026-04-14Verified by operator
New Hampshire State AGbd_cca3ba3c3341f1822026-04-14Verified by operator

Name: Cookeville Regional Medical Center
norm: cookeville regional medical center

Name: Cookeville Regional Medical Center
norm: cookeville regional medical center

Discovered: Jul 14, 2025
Breach occurred: Jul 11, 2025 – Jul 14, 2025
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 16, 2026
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial

During the incident: Began an internal investigation
Worked to secure our systems
Notified law enforcement
Engaged a forensic security firm to assist with our investigation
Changes made: Securing our systems
Strengthening our technical safeguards
Arranged for you to enroll in a free one-year membership of Experian IdentityWorksSM Credit 3B
Source: Quoted from the filing itself, not independently verified.

Compliance flags: Leak >180d
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 · 4 filings · 4 states

View merged incident ↗

Maine State AGApr 14 · first

Massachusetts State AGApr 14 · first

New Hampshire State AGApr 14 · first

Nebraska State AGApr 14 · 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://nebraska.gov/ago/data-breach/documents/4d5602fe-a7ea-4e97-bc80-06ae77a1f2f6.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 14, 2026
Raw hash: a32ad27a04adada4cfb388bf9a74549385393078ca1f225921b7f9fe8b725962

Linked disclosures

Ransomware claims (2)

Regulatory filings (3) · sorted by filing gap

Reporting entityCookeville Regional Medical Center

Victim entityCookeville Regional Medical Center

Incidentdiscovered Jul 14, 2025

Stated responseBegan an internal investigation

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancenebraska.gov