HackingHealthcareTechnologyHealthcareStolen CredentialsTargetedCustomer Data InvolvedIdentity (basic)Government IDPHIHealth (basic)MediumContained

Trusteed Plan Services Corporation

bd_6bb953f8b0288db2 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 26, 2024

Filed

Sep 22, 2025

To disclose

39 weeks

Affected

2state residents only

Linked

10 filings

Confidence

67%

Full breach record for Trusteed Plan Services Corporation →

Trusteed Plans Service Corporation (TPSC) notified the New Hampshire Attorney General of a cybersecurity incident discovered on December 26, 2024. An unauthorized user gained access to TPSC's environment, potentially exposing names, addresses, SSNs, dates of birth, and PHI (medical treatment/diagnosis/procedure info, Medicare/Medicaid numbers) of 2 New Hampshire residents. TPSC engaged forensic investigators, secured systems, and offered 24 months of credit monitoring. No evidence of misuse was found.

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Incident timeline

discovery → filing · 39 weeks / 270 days

Dec 26, 2024

Discovered

Sep 22, 2025

Filed

vs. sector median

+30 wks slower

This filing is one of 10 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

HHS OCRbd_447f5e820983570c2025-09-17 · +5dVerified
Massachusetts State AGbd_24e85d893faf6a722025-09-16 · +6dVerified
Maine State AGbd_239543df911e11ae2025-09-15 · +7dVerified
Oregon State AGbd_2784da27b9d225032025-09-15 · +7dVerified

Show 5 more filings ↓up to 7d gap

Montana State AGbd_2fd6c2009f8f2fd32025-09-15 · +7dVerified
Washington State AGbd_4bf1c9fac6cb92602025-09-15 · +7dVerified
Indiana State AGbd_7865db4bd7dd399f2025-09-15 · +7dVerified
Nebraska State AGbd_7c306950c9a0e7632025-09-15 · +7dVerified
California State AGbd_e877db61aece8a952025-09-15 · +7dVerified

Name: Wilson, Elser, Moskowitz, Edelman & Dicker LLP
norm: wilson elser moskowitz edelman dicker
Domain: wilsonelser.com

Name: Trusteed Plan Services Corporation
norm: trusteed plan
Industry: HealthcarellmTechnologyllm

Discovered: Dec 26, 2024
Materiality determined: —
Notification sent: Sep 15, 2025
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government IDPHIHealth (basic)
Data elements: Social Security numberMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General
Initial access: valid_credentials

During the incident: Engaged a specialized third-party cybersecurity firm to secure its computer systems and conduct a comprehensive investigation
Conducted a data mining exercise with the assistance of a third-party vendor to identify the individuals impacted
Engaged a third-party notification vendor to provide affected individuals with complimentary credit monitoring services
Disengaged all access to our network
Changed administrative credentials
Restored operations in a safe and secure mode
Changes made: Upgraded desktop operating systems
Increased firewall security
Further implementation of multi-factor authentication
Deployed additional security agents to monitor server and desktop activity
Engaged third-party vendor for internal assessments and external penetration testing
Encrypted data at rest
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 39 weeks(270 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 9 states

View merged incident ↗

Maine State AGSep 15 · first

Oregon State AGSep 15 · first

Montana State AGSep 15 · first

Washington State AGSep 15 · first

Indiana State AGSep 15 · first

Nebraska State AGSep 15 · first

California State AGSep 15 · first

Massachusetts State AG+1d

HHS OCR+2d

New Hampshire State AG+7d · this page

Pattern: first filing Sep 15 (ME), last Sep 22 (NH) — 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://mm.nh.gov/files/uploads/doj/remote-docs/trusteed-plans-service-20250922.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 22, 2025
Raw hash: 5fcb9a63d32306545af507f48737ef0a1a3f1b77faaadf5da25c6c5dd7a7a025

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityWilson, Elser, Moskowitz, Edelman & Dicker LLP

Victim entityTrusteed Plan Services Corporation

Incidentdiscovered Dec 26, 2024

Stated responseEngaged a specialized third-party cybersecurity firm to secure its computer systems and conduct a comprehensive investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov