HackingHealthcareTechnologyHealthcareStolen CredentialsCapture Stored DataData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDHealth (basic)PHIMediumContained

EpiSource

bd_8bfabd788a54c7dd · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 6, 2025

Filed

Nov 12, 2025

To disclose

40 weeks

Affected

1state residents only

Linked

24 filings

Confidence

65%

Full breach record for EpiSource →4 incidents on file

Episource, LLC notified Montana and other states of a data breach occurring between Jan 27 and Feb 6, 2025. A criminal accessed systems, copying health insurance data, health data, SSNs, and contact info. Episource detected the incident on Feb 6, 2025, engaged law enforcement, and offered 2 years of credit monitoring. Notifications began April 23, 2025.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 10 days

discovery → filing · 40 weeks / 279 days

Jan 27, 2025

Begins

Feb 6, 2025

Discovered

Nov 12, 2025

Filed

vs. sector median

+29 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

California State AGbd_26b46fb1375699872025-11-12Verified by operator
California State AGbd_9fbf33f1d80fd6cd2025-10-15 · +28dVerified by operator
Oregon State AGbd_a777c7526ecf94bd2025-12-11 · +29dVerified by operator
California State AGbd_f7b2fef6a5a68d492025-10-01 · +42dVerified by operator

Show 6 more filings ↓up to 91d gap

California State AGbd_9fdbc50e284e387e2025-09-22 · +51dVerified by operator
New Hampshire State AGbd_a2b82676192bff452025-09-15 · +58dVerified by operator
California State AGbd_1b92ab769d91dc2a2025-09-11 · +62dVerified by operator
California State AGbd_e03b6cfce712071e2026-02-09 · +89dVerified by operator
New Hampshire State AGbd_5f78056b95d71c8e2026-02-10 · +90dVerified by operator
Texas State AGbd_902d3567da6db0052026-02-11 · +91dVerified 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: Apr 23, 2025
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDHealth (basic)PHI
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated CollectionT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Hired a special team to help us
Called law enforcement
Turned off our computer systems to help protect our customers and their patients and members
Offering two (2) years of free credit monitoring and identity theft protection services
Changes made: Making our computer systems even stronger than before
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 40 weeks(279 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 5 states

View merged incident ↗

California State AGSep 11 · first

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 · this page

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://dojmt.gov/wp-content/uploads/2025/11/Consumer-notification-letter-26.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 12, 2025
Raw hash: 875a487417862106d579a6652aa9d4d47705505a7f1850cf13a0648230dfd191

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityEpiSource

Victim entityEpiSource

Incidentdiscovered Feb 6, 2025

Stated responseHired a special team to help us

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov