WISCONSINMalwareHealthcareFinancial ServicesHealthcareRansomwareCapture Stored DataCustomer Data InvolvedData EncryptedRansom DemandedData ExfiltratedIDENTITY_BASICIDENTITY_GOVERNMENTHEALTH_BASICCriticalContained
Group Health Cooperative of South Central Wisconsin
bd_453e14285276c3d3 · schema v1 · pii pii-v1
Full breach record for Group Health Cooperative of South Central Wisconsin →Group Health Cooperative of South Central Wisconsin (a Health Plan, WI) reported to HHS on 2024-04-08 a ransomware attack affecting 533,809 individuals. PHI on network servers was compromised, including names, Social Security numbers, addresses, dates of birth, and medical record numbers. The CE notified HHS, affected individuals, and the media, provided substitute notice and complimentary credit monitoring, and implemented additional administrative, technical, and security safeguards. Staff were retrained on PHI protection.
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.
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
- bd_7d9f6fe2b75d08b8Maine State AGfiled 2024-04-08Candidate
- bd_f89f7efae99505a4Wisconsin State AGfiled 2024-02-09(59d gap)Verified by operator
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
- Apr 8, 2024
- Raw hash
- 04d96ce53f25ce8fa6e6de4288c14ecd962e372563052eb7d841159fa97f033b
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
- Group Health Cooperative of South Central Wisconsinnorm: group health cooperative of south central wisconsin
- Industry
- Insurance — Health
Victim entity
- Name
- Group Health Cooperative of South Central Wisconsinnorm: group health cooperative of south central wisconsin
- Industry
- Insurance — Health
- Industry
- Healthcaresource defaultFinancial Servicesllm
Incident
- Discovered
- Not extracted — the OCR public portal omits it
- Materiality determined
- —
- Notification sent
- —
- Affected individuals
- 533,809
- Data types
- IDENTITY_BASICIDENTITY_GOVERNMENTHEALTH_BASIC
- Attack vector
- Unauthorized Access
- MITRE ATT&CK
- T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 ChannelT1078 Valid Accounts
- 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.