HackingHealthcareHealthcareStolen CredentialsData ExfiltratedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDFinancial accountHealth (basic)PHIHighActive

Klickitat Valley Health

bd_d834f570354fb260 · schema v1 · pii pii-v1

Severity

High

Discovered

Feb 23, 2025

Filed

Mar 14, 2025

To disclose

19 days

Affected

11,960state residents only

Linked

2 filings

Confidence

70%

Full breach record for Klickitat Valley Health →2 incidents on file

Supplemental notification for Klickitat Valley Health regarding a cyberattack discovered on Feb 23, 2025. Unauthorized access on Feb 18, 2025 exposed PHI, SSNs, and financial data for 11,960 WA residents. Notifications began Mar 14, 2025. Investigation ongoing.

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Washington clock✓ WA AG ≤30d19 days discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 5 days

discovery → filing · 19 days

Feb 18, 2025

Begins

Feb 23, 2025

Discovered

Mar 14, 2025

Filed

vs. sector median

10 wks faster

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

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

HHS OCRbd_7d42b0742877847a2025-03-14Verified

Name: BAKER & HOSTETLER LLP
norm: baker hostetler

Name: Klickitat Valley Health
norm: klickitat valley health
Domain: kvhealth.net
Industry: Healthcarellm

Discovered: Feb 23, 2025
Breach occurred: Feb 18, 2025
Undetected for: 5 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 14, 2025
Affected individuals: 11,960state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)PHI
Data elements: NameSocial Security numberDate of birthHealth insurance IDMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 0d
WA-stated discovery: Found after the fact
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: Reported incident to Washington Attorney General's Office
Initial access: valid_credentials

During the incident: Immediately took steps to contain the incident
Began an investigation with assistance from external cybersecurity experts
Reported the incident to law enforcement
Began mailing notification letters to affected residents
Offered complimentary membership to credit monitoring and identity protection services
Established a dedicated call center
Changes made: Continuously updates and enhances systems to protect data
Offering complimentary one-year membership in Experian IdentityWorks Credit 3B
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 19 days(19 days from discovery to filing)
Compliance flags: WA AG ≤30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings

View merged incident ↗

HHS OCRMar 14 · first

Washington State AGMar 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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA32694.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 14, 2025
Raw hash: fe6fe05e71cb613cf4b25f3bf4665ea63d2e5886ade5eea30054e9549d60d6df

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityBAKER & HOSTETLER LLP

Victim entityKlickitat Valley Health

Incidentdiscovered Feb 23, 2025

Stated responseImmediately took steps to contain the incident

ComplianceWA AG ≤30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com