MalwareHealthcareHealthcareRansomwareTargetedIdentity (basic)LowContained

ARTEMIS HEALTHCARE I HEDGECO, LLC

bd_7bc2ee7fff02d143 · schema v1 · pii pii-v1

Severity

Low

Discovered

May 31, 2025

Filed

Dec 23, 2025

To disclose

29 weeks

Affected

Not disclosed

Linked

3 filings

Confidence

65%

Full breach record for ARTEMIS HEALTHCARE I HEDGECO, LLC →

Artemis Healthcare, Inc. disclosed a ransomware attack targeting its network between May 5 and May 31, 2025. The incident was discovered on May 31, 2025. The breach impacted patient information, including names and potentially other data elements. Artemis engaged third-party forensic specialists, reset passwords, and notified regulators. Notification was sent on December 23, 2025, to individuals in multiple states including Vermont, Maryland, New York, North Carolina, and Rhode Island.

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Vermont clock✗ VT AG >45 bday29 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 26 days

discovery → filing · 29 weeks / 206 days

May 5, 2025

Begins

May 31, 2025

Discovered

Dec 23, 2025

Filed

vs. sector median

+17 wks slower

This filing is one of 3 about the same incident.View merged incident

A leak claim by crypto24 about this victim predates this filing by 188 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitecrypto24bd_446526c32bfe17352025-06-18 · +188dVerified

Regulatory filings (1) · sorted by filing gap

HHS OCRbd_df89e3fc181e39602025-12-23Verified

Name: ARTEMIS HEALTHCARE I HEDGECO, LLC
norm: artemis healthcare i hedgeco
Domain: arianadx.com

Name: ARTEMIS HEALTHCARE I HEDGECO, LLC
norm: artemis healthcare i hedgeco
Domain: arianadx.com
Industry: Healthcarellm

Discovered: May 31, 2025
Breach occurred: May 5, 2025 – May 31, 2025
Undetected for: 26 daysoccurrence → discovery
Materiality determined: Dec 23, 2025
Notification sent: Dec 23, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for Impact
Threat actor: ExternalFinancial
Regulator citations: Notified relevant state and federal regulators

During the incident: Force changing passwords and terminating active sessions
Launched an investigation
Worked with the assistance of third-party forensic specialists to secure the network and to determine the nature and scope of the activity
Undertook a thorough review of the potentially impacted files
Notified relevant state and federal regulators
Changes made: Reviewing existing policies and procedures
Providing additional training for employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 29 weeks(206 days from discovery to filing)
Compliance flags: VT AG >45 bdayLeak >180d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

HHS OCRDec 23 · first

Vermont State AGDec 23 · 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://ago.vermont.gov/document/2025-12-23-artemis-healthcare-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 23, 2025
Raw hash: 64081b5946e2178aa1a320be056e9ebb7ec95a04746d73f29fa795dc63bbaffa

Linked disclosures

Ransomware claims (1)

Regulatory filings (1) · sorted by filing gap

Reporting entityARTEMIS HEALTHCARE I HEDGECO, LLC

Victim entityARTEMIS HEALTHCARE I HEDGECO, LLC

Incidentdiscovered May 31, 2025

Stated responseForce changing passwords and terminating active sessions

ComplianceVT AG >45 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov