HackingHealthcareTechnologyHealthcareVulnerability ExploitStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Health (basic)PHILowContained

EpiSource

bd_278e1dec2e1b4e36 · schema v1 · pii pii-v1

Severity

Low

Discovered

Feb 20, 2023

Filed

Jun 9, 2023

To disclose

16 weeks

Affected

2state residents only

Linked

4 filings

Confidence

66%

Full breach record for EpiSource →4 incidents on file

Episource, a medical coding vendor, notified Montana residents of a data breach involving unauthorized access to its AWS environment between Feb 19-21, 2023. Suspicious activity was detected on Feb 20, 2023. Compromised data included names, DOBs, addresses, MRNs, and clinical data. No SSNs or financial data were involved. Episource engaged forensic investigators, hardened AWS security, and offered one year of LifeLock identity theft protection.

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Incident timeline

undetected · 1 days

discovery → filing · 16 weeks / 109 days

Feb 19, 2023

Begins

Feb 20, 2023

Discovered

Jun 9, 2023

Filed

vs. sector median

+5 wks slower

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Oregon State AGbd_e609d81cc43fbf8f2023-06-09Verified
HHS OCRbd_2b5d69aa74007bf32023-06-02 · +7dVerified
California State AGbd_ba99421fd948eec92023-06-02 · +7dVerified

Name: EpiSource
norm: episource

Name: EpiSource
norm: episource
Industry: HealthcarellmTechnologyllm

Discovered: Feb 20, 2023
Breach occurred: Feb 19, 2023 – Feb 21, 2023
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 2state-resident count only
Data types: Identity (basic)Health (basic)PHI
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Initial access: exploit_public_facing

During the incident: Took action to contain the incident and prevent further unauthorized access
Began an investigation and engaged a security firm
Hardened the EpiSource AWS environment
Enhanced its security controls and monitoring practices
Offered one year of complimentary LifeLock StandardTM identity theft protection services
Changes made: Enhanced its security controls and monitoring practices to minimize the risk of any similar incident occurring in the future
Reinforced its policies and practices and evaluated additional safeguards to prevent similar incidents from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 weeks(109 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

HHS OCRJun 2 · first

California State AGJun 2 · first

Oregon State AG+7d

Montana State AG+7d · this page

Pattern: first filing Jun 2 (MN), last Jun 9 (MT) — a 7-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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-343.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 9, 2023
Raw hash: 69c91b37a7f2525825f5bacad255baad9cafd8d05df9f8d3c0ef56a29c2d0444

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityEpiSource

Victim entityEpiSource

Incidentdiscovered Feb 20, 2023

Stated responseTook action to contain the incident and prevent further unauthorized access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov