MalwareHealthcareHealthcareRansomwareData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedPHIHealth (basic)Financial accountGovernment IDIdentity (basic)MediumContained

Ascension Health Alliance

bd_8febdcacf791a205 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 8, 2024

Filed

Feb 3, 2025

To disclose

39 weeks

Affected

Not disclosed

Linked

10 filings

Confidence

64%

Full breach record for Ascension Health Alliance →12 incidents on file

Ascension Health detected a ransomware attack on May 8, 2024, involving unauthorized access to systems on May 7-8, 2024. A cybercriminal exfiltrated files containing patient and associate personal information, including medical records, payment info, and government IDs. The organization engaged cybersecurity experts, notified law enforcement, and offered identity theft protection.

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California clockDiscovered May 8, 2024 → Notified Dec 19, 2024225d ✗ CA 60-day late39 weeks discovery → filing

Incident timeline

undetected · 1 days

discovery → filing · 39 weeks / 271 days

May 7, 2024

Begins

May 8, 2024

Discovered

Feb 3, 2025

Filed

vs. sector median

+26 wks slower

This filing is one of 10 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

Oregon State AGbd_a6331b2f68fc294d2025-02-03Verified
New Hampshire State AGbd_cea8e043db648dd82025-02-07 · +4dVerified
Oregon State AGbd_87337b5050c1dc472024-12-19 · +46dVerified
California State AGbd_afc6dca482d6c28a2024-12-19 · +46dVerified

Show 5 more filings ↓up to 64d gap

Massachusetts State AGbd_de54a21bf0edc2992024-12-19 · +46dVerified
Delaware State AGbd_f10476fe89d1d25d2024-12-19 · +46dVerified
Washington State AGbd_ffe2ffef268362d82024-12-19 · +46dVerified
Maine State AGbd_ffefbbb101b0be3f2024-12-19 · +46dVerified
Illinois State AGbd_ca4d2ffed869b7032024-12-01 · +64dVerified

Name: Ascension Health Alliance
norm: ascension health alliance
Domain: ascension.org

Name: Ascension Health Alliance
norm: ascension health alliance
Domain: ascension.org
Industry: Healthcarellm

Discovered: May 8, 2024
Breach occurred: May 7, 2024 – May 8, 2024
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Dec 19, 2024
Affected individuals: Not disclosed
Data types: PHIHealth (basic)Financial accountGovernment IDIdentity (basic)
Data elements: Medical information
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified law enforcement and government regulators

During the incident: Launched an investigation with leading cybersecurity experts
Notified law enforcement and government regulators
Implemented enhanced security measures to prevent similar incidents from occurring in the future
Arranged to offer identity theft protection services through IDX
Changes made: Implemented enhanced security measures to prevent similar incidents from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 39 weeks(271 days from discovery to filing)
Compliance flags: CA 60-day late · 225d
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: May 8, 2024
→ Notified: Dec 19, 2024
225d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: May 8, 2024 → Notified: Dec 19, 2024	225d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 8 states

View merged incident ↗

Illinois State AGDec 1 · first

Oregon State AG+18d

California State AG+18d

Massachusetts State AG+18d

Delaware State AG+18d

Washington State AG+18d

Maine State AG+18d

Oregon State AG+64d

California State AG+64d · this page

New Hampshire State AG+68d

Pattern: first filing Dec 1 (IL), last Feb 7 (NH) — a 68-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/sb24-598203
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 3, 2025
Raw hash: 4a338d25583b435fc44cc8d35ca007aeda4673ec2ef60bce23d49338a69123a2

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityAscension Health Alliance

Victim entityAscension Health Alliance

Incidentdiscovered May 8, 2024

Stated responseLaunched an investigation with leading cybersecurity experts

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov