MalwareHealthcareHealthcareRansomwareData ExfiltratedRansom DemandedRansom PaidSupply Chain (3P Vendor)Customer Data InvolvedPHIIdentity (basic)Health (basic)LowContained

Methodist Hospital of Southern California

bd_597393eee158ef0e · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 9, 2020

Filed

Nov 4, 2020

To disclose

8 weeks

Affected

Not disclosed

Linked

2 filings

Confidence

65%

Full breach record for Methodist Hospital of Southern California →

Methodist Hospital of Southern California notified patients of a data breach involving a ransomware attack on its vendor, Blackbaud Inc. The attack occurred between February and May 2020, with discovery on September 9, 2020. Patient information including names, contact details, demographics, and medical record numbers was exfiltrated. Blackbaud paid the ransom and confirmed data destruction. MHSC reported the incident to the California Department of Public Health and implemented remediation measures.

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California clockDiscovered Sep 9, 2020 → Notified Oct 20, 202041d ✓ CA 60-day OK8 weeks discovery → filing

Incident timeline

undetected · 221 days

discovery → filing · 8 weeks / 56 days

Feb 1, 2020

Begins

Sep 9, 2020

Discovered

Nov 4, 2020

Filed

vs. sector median

5 wks faster

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

Part of BLACKBAUD, INC. supply-chain incident (2020) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

HHS OCRbd_b797ec81be26bb952020-11-04Verified by operator

Name: Methodist Hospital of Southern California
norm: methodist hospital of southern california

Name: Methodist Hospital of Southern California
norm: methodist hospital of southern california
Industry: Healthcarellm

Discovered: Sep 9, 2020
Breach occurred: Feb 1, 2020 – May 31, 2020
Undetected for: 221 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 20, 2020
Affected individuals: Not disclosed
Data types: PHIIdentity (basic)Health (basic)
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Reported this incident to the California Department of Public Health
Third party: via Blackbaud Inc.

During the incident: Initiated a full investigation once the incident was identified
Reported this incident to the California Department of Public Health
Engaged independent forensics experts and law enforcement
Expelled the cybercriminal from its system
Paid the ransom and received confirmation that the cybercriminal had destroyed the copy of the data
Changes made: Implemented changes to help protect its system from any future incidents
Identified the vulnerability associated with this incident and taken actions to fix it
Accelerating efforts to further improve its systems through enhancements to access management, network segmentation, and other network-based platforms
Hired a third-party team of experts to monitor the dark web for any further misuse of the data
Reviewing and minimizing the sensitive data elements that are provided to the Foundation and/or Blackbaud
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(56 days from discovery to filing)
Compliance flags: CA 60-day OK · 41d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Sep 9, 2020
→ Notified: Oct 20, 2020
41d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Sep 9, 2020 → Notified: Oct 20, 2020	41d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings

View merged incident ↗

HHS OCRNov 4 · first

California State AGNov 4 · 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://oag.ca.gov/ecrime/databreach/reports/sb24-195825
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 4, 2020
Raw hash: f48496337d0965a46257a5f0e9bf055581bf4174d949b92b9a9f81c0c354b00c

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMethodist Hospital of Southern California

Victim entityMethodist Hospital of Southern California

Incidentdiscovered Sep 9, 2020

Stated responseInitiated a full investigation once the incident was identified

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov