ILMalwareHealthcareHealthcareRansomwareBusiness Associate (HIPAA)Customer Data InvolvedData EncryptedData ExfiltratedRansom DemandedHEALTH_BASICIDENTITY_BASICIDENTITY_GOVERNMENTCriticalResolved
Cook County Health
bd_2fb1e8ae3723791a · schema v1 · pii pii-v1
Full breach record for Cook County Health →Cook County Health and Hospitals System (IL) reported to HHS OCR on 2023-09-24 that its business associate experienced a ransomware attack affecting 1,248,546 individuals. PHI on network servers was compromised, including names, addresses, dates of birth, Social Security numbers, diagnoses, and other treatment information. The CE notified HHS, affected individuals, and the media, and terminated its business relationship with the responsible BA.
HIPAA clock✓ HHS notified
⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.
⚠ No discovery dateThe OCR public portal omits the discovery date, so the 60-day notification clock cannot be evaluated from this source — only that the filing was submitted.
Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1,248,546 affectedView incident
Source provenance
- Source URL
- https://ocrportal.hhs.gov/ocr/breach/breach_report.jsf
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
- Filed at
- Sep 24, 2023
- Raw hash
- 353d838f97f5b56127e8c64a544fdc97e3dc7518850e755add7545e089c0ab2b
Source filing
AI-assisted summary above. The structured extract on this page was generated from the document below. Inspect the source to verify or correct any field.
Reporting entity
- Name
- Cook County Healthnorm: cook county health
- Industry
- Health Care Services
Victim entity
- Name
- Cook County Healthnorm: cook county health
- Industry
- Health Care Services
- Industry
- Healthcaresource default
Incident
- Discovered
- Not extracted — the OCR public portal omits it
- Materiality determined
- —
- Notification sent
- —
- Affected individuals
- 1,248,546
- Data types
- HEALTH_BASICIDENTITY_BASICIDENTITY_GOVERNMENT
- Attack vector
- Unauthorized Access
- MITRE ATT&CK
- T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
- Threat actor
- ExternalFinancial
- Regulator citations
- HHS OCR notified
Compliance
- Compliance flags
- HHS notified
- Discovery-date grounding
- no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.
- Clock breakdown
Statute Window Elapsed Threshold Status HIPAA Discovered: not extracted→ Notified: not extracted— regulatory submission HHS notified
Extraction provenance
- Status
- No extraction artifact recorded for this disclosure.