HackingHealthcareTechnologyHealthcareData ExfiltratedCustomer Data InvolvedPHIIdentity (basic)Government IDHealth (basic)MediumContained

EpiSource

bd_1b92ab769d91dc2a · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 6, 2025

Filed

Sep 11, 2025

To disclose

31 weeks

Affected

Not disclosed

Linked

24 filings

Confidence

64%

Full breach record for EpiSource →4 incidents on file

Episource, LLC reported unauthorized access to its computer systems between January 27, 2025, and February 6, 2025. The incident involved the exfiltration of protected health information (PHI), including medical records, diagnoses, and treatment data, as well as personal identifiable information (PII) such as names, addresses, and government IDs. Episource detected unusual activity on February 6, 2025, and contained the incident by shutting down systems. Law enforcement was notified. Affected individuals are offered two years of credit monitoring.

J jump to incidentP pin to compareR raw source

California clockDiscovered Feb 6, 2025 → Notified Jun 6, 2025120d ✗ CA 60-day late31 weeks discovery → filing

Incident timeline

undetected · 10 days

discovery → filing · 31 weeks / 217 days

Jan 27, 2025

Begins

Feb 6, 2025

Discovered

Sep 11, 2025

Filed

vs. sector median

+20 wks slower

This filing is one of 24 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

New Hampshire State AGbd_a2b82676192bff452025-09-15 · +4dVerified by operator
California State AGbd_9fdbc50e284e387e2025-09-22 · +11dVerified by operator
California State AGbd_f7b2fef6a5a68d492025-10-01 · +20dVerified by operator
California State AGbd_9fbf33f1d80fd6cd2025-10-15 · +34dVerified by operator

Show 6 more filings ↓up to 153d gap

California State AGbd_26b46fb1375699872025-11-12 · +62dVerified by operator
Montana State AGbd_8bfabd788a54c7dd2025-11-12 · +62dVerified by operator
Oregon State AGbd_a777c7526ecf94bd2025-12-11 · +91dVerified by operator
California State AGbd_e03b6cfce712071e2026-02-09 · +151dVerified by operator
New Hampshire State AGbd_5f78056b95d71c8e2026-02-10 · +152dVerified by operator
Texas State AGbd_902d3567da6db0052026-02-11 · +153dVerified by operator

Showing first 10 of 23 linked disclosures.

Name: EpiSource
norm: episource

Name: EpiSource
norm: episource
Industry: HealthcarellmTechnologyllm

Discovered: Feb 6, 2025
Breach occurred: Jan 27, 2025 – Feb 6, 2025
Undetected for: 10 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 6, 2025
Affected individuals: Not disclosed
Data types: PHIIdentity (basic)Government IDHealth (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External

During the incident: Took steps to stop the activity
Began investigating right away
Hired a special team to help
Called law enforcement
Turned off computer systems
Changes made: Making computer systems even stronger than before
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 31 weeks(217 days from discovery to filing)
Compliance flags: CA 60-day late · 120d
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: Feb 6, 2025
→ Notified: Jun 6, 2025
120d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Feb 6, 2025 → Notified: Jun 6, 2025	120d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 5 states

View merged incident ↗

California State AGSep 11 · first · this page

New Hampshire State AG+4d

California State AG+11d

California State AG+20d

California State AG+34d

California State AG+62d

Montana State AG+62d

Oregon State AG+91d

California State AG+151d

New Hampshire State AG+152d

Texas State AG+153d

Pattern: first filing Sep 11 (CA), last Feb 11 (TX) — a 153-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 23 — the full spread may be wider.

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/sb24-608454
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 11, 2025
Raw hash: 8fd7b8f71738885048f384126d563870b5ba2eff2d648127906cfdfb7e7c7e1d

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityEpiSource

Victim entityEpiSource

Incidentdiscovered Feb 6, 2025

Stated responseTook steps to stop the activity

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov