HackingHealthcareHealthcareData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHealth (basic)MediumActive

Legacy Treatment Services

bd_c53e05a41e7e0934 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 18, 2025

Filed

Aug 25, 2025

To disclose

5 weeks

Affected

3state residents only

Linked

5 filings

Confidence

66%

Full breach record for Legacy Treatment Services →2 incidents on file

Legacy Treatment Services, Inc. notified the New Hampshire Attorney General of a cybersecurity incident affecting 3 NH residents. Unauthorized access occurred between Oct 6-11, 2024. Data included names, SSNs, and health info. Legacy engaged forensic investigators, took systems offline, and notified law enforcement. Notifications to residents began Aug 22, 2025, offering credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 285 days

discovery → filing · 5 weeks / 38 days

Oct 6, 2024

Begins

Jul 18, 2025

Discovered

Aug 25, 2025

Filed

vs. sector median

4 wks faster

This filing is one of 5 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Indiana State AGbd_1b6f00452a58973e2025-08-22 · +3dVerified by operator
Vermont State AGbd_2163f16572f12a4f2025-08-22 · +3dVerified by operator
Maine State AGbd_eb554231f98f22042025-08-22 · +3dVerified by operator
HHS OCRbd_5a4c54d35d7bfc7e2024-12-31 · +237dVerified

Name: MCDONALD HOPKINS LLC
norm: mcdonald hopkins

Name: Legacy Treatment Services
norm: legacy treatment
Domain: legacytreatment.org
Industry: Healthcarellm

Discovered: Jul 18, 2025
Breach occurred: Oct 6, 2024 – Oct 11, 2024
Undetected for: 285 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 22, 2025
Affected individuals: 3state-resident count only
Data types: Identity (basic)Government IDHealth (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Notified and is cooperating with law enforcement
Initial access: exploit_public_facing

During the incident: Took certain systems offline
Engaged professionals experienced in handling these types of incidents to assist Legacy with an investigation
Notified and is cooperating with law enforcement
Offering complimentary credit monitoring to individuals that had a Social Security number potentially impacted
Changes made: Continually evaluates and modifies its practices and internal controls to enhance the security and privacy of your information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(38 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

HHS OCRDec 31 · first

Indiana State AG+234d

Vermont State AG+234d

Maine State AG+234d

New Hampshire State AG+237d · this page

Pattern: first filing Dec 31 (NJ), last Aug 25 (NH) — a 237-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://mm.nh.gov/files/uploads/doj/remote-docs/legacy-treatment-20250825.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 25, 2025
Raw hash: 718fe75a0feff5cb054248401f7471737cdff371a687f575ccf403586238b302

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityMCDONALD HOPKINS LLC

Victim entityLegacy Treatment Services

Incidentdiscovered Jul 18, 2025

Stated responseTook certain systems offline

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov