MalwareHealthcareHealthcareRansomwareCapture Stored DataData ExfiltratedTargetedIdentity (basic)PHIPIIHealth (basic)MediumContained

Health Services Seattle, LLC

bd_11172e5ce2dbe9d6 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jan 28, 2025

Filed

Aug 13, 2025

To disclose

28 weeks

Affected

7,389state residents only

Confidence

70%

Full breach record for Health Services Seattle, LLC →

Health Services Seattle, LLC reported a ransomware cyberattack affecting 7,389 Washington residents. Unauthorized access occurred Jan 2–28, 2025. The company discovered the incident on Jan 28, 2025, and confirmed data exfiltration on May 14, 2025. Impacted data included names and potentially other PII. The company engaged external cybersecurity professionals for investigation.

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Washington clock✗ WA AG >90d28 weeks 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 · 26 days

discovery → filing · 28 weeks / 197 days

Jan 2, 2025

Begins

Jan 28, 2025

Discovered

Aug 13, 2025

Filed

vs. sector median

+16 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed7,389 affectedView incident

Name: Health Services Seattle, LLC
norm: health services seattle

Name: Health Services Seattle, LLC
norm: health services seattle
Industry: Healthcarellm

Discovered: Jan 28, 2025
Breach occurred: Jan 2, 2025 – Jan 28, 2025
Undetected for: 26 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 7,389state-resident count only
Data types: PIIIdentity (basic)
Data elements: NameDate of birthHealth insurance IDMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial

During the incident: Worked very closely with external cybersecurity professionals experienced in handling these types of situations to assist us in determining the full extent of the incident and the scope of any data impacted
Changes made: Continually evaluate and modify our practices and internal controls to enhance the security and privacy of your personal information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 28 weeks(197 days from discovery to filing)
Compliance flags: WA AG >90d
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.

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/BreachM19915.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 13, 2025
Raw hash: 4d767844df18aa177a672d29d69e35bcd3c191ce13b40473dfa832a8123017dd

Reporting entityHealth Services Seattle, LLC

Victim entityHealth Services Seattle, LLC

Incidentdiscovered Jan 28, 2025

Stated responseWorked very closely with external cybersecurity professionals experienced in handling these types of situations to assist us in determining the full extent of the incident and the scope of any data impacted

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com