HackingHealthcareTechnologyHealthcareStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDPHIHealth (basic)HighContained

Trusteed Plan Services Corporation

bd_4bf1c9fac6cb9260 · schema v1 · pii pii-v1

Severity

High

Discovered

Dec 26, 2024

Filed

Sep 15, 2025

To disclose

38 weeks

Affected

13,659state residents only

Linked

10 filings

Confidence

70%

Full breach record for Trusteed Plan Services Corporation →

Trusteed Plans Service Corporation (TPSC), a healthcare benefit solution provider, disclosed a cybersecurity incident discovered on December 26, 2024. An unauthorized user gained access to TPSC's environment, potentially exposing names, addresses, SSNs, DOBs, and PHI (medical/diagnosis info) of 13,659 Washington residents. TPSC engaged forensic investigators, secured systems, and offered 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Washington clock✗ WA AG >90d38 weeks discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 38 weeks / 263 days

Dec 26, 2024

Begins

Dec 26, 2024

Discovered

Sep 15, 2025

Filed

vs. sector median

+27 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

Maine State AGbd_239543df911e11ae2025-09-15Verified
Oregon State AGbd_2784da27b9d225032025-09-15Verified
Montana State AGbd_2fd6c2009f8f2fd32025-09-15Verified
Indiana State AGbd_7865db4bd7dd399f2025-09-15Verified

Show 5 more filings ↓up to 7d gap

Nebraska State AGbd_7c306950c9a0e7632025-09-15Verified
California State AGbd_e877db61aece8a952025-09-15Verified
Massachusetts State AGbd_24e85d893faf6a722025-09-16 · +1dVerified
HHS OCRbd_447f5e820983570c2025-09-17 · +2dVerified
New Hampshire State AGbd_6bb953f8b0288db22025-09-22 · +7dVerified

Name: Wilson Elser Moskowitz Edelman and Dicker LLP
norm: wilson elser moskowitz edelman and dicker

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

Discovered: Dec 26, 2024
Breach occurred: Dec 26, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 15, 2025
Affected individuals: 13,659state-resident count only
Data types: Identity (basic)Government IDPHIHealth (basic)
Data elements: NameSocial Security numberDate of birthHealth insurance IDMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 0dexposure 0d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified Washington Attorney General's Office
Initial access: valid_credentials

During the incident: Engaged a specialized third-party cybersecurity firm to secure its computer systems and conduct a comprehensive investigation
Disconnected all access to our network
Changed administrative credentials
Restored operations in a safe and secure mode
Enhanced the security measures
Offered twelve (12) months of complimentary credit monitoring and identity theft restoration services through HaystackID
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: 38 weeks(263 days from discovery to filing)
Compliance flags: WA AG >90d
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

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

Indiana State AGSep 15 · first

Nebraska State AGSep 15 · first

California State AGSep 15 · first

Washington State AGSep 15 · first · this page

Massachusetts State AG+1d

HHS OCR+2d

New Hampshire State AG+7d

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA34672.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 15, 2025
Raw hash: b0fb388d4ea00df82eefeae661199929e624eaa1dd057c31bd5ea23ccd37ddd2

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityWilson Elser Moskowitz Edelman and 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

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com