HackingTechnologyHealthcareInformationStolen CredentialsCustomer Data InvolvedEmployee Data InvolvedPIIIdentity (basic)Government IDMinorMediumContained

Trusteed Plan Services Corporation

bd_2fd6c2009f8f2fd3 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 26, 2024

Filed

Sep 15, 2025

To disclose

38 weeks

Affected

112state residents only

Linked

10 filings

Confidence

66%

Full breach record for Trusteed Plan Services Corporation →

Trusteed Plans Service Corporation (TPSC) notified Montana residents of a data security incident detected on December 26, 2024. An unauthorized user gained access to TPSC's environment, potentially exposing personal information including names, SSNs, and dates of birth for adults and minors. TPSC engaged forensic investigators, secured systems, and offered 12 months of credit monitoring via HaystackID. No evidence of misuse was found.

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Incident timeline

discovery → filing · 38 weeks / 263 days

Dec 26, 2024

Discovered

Sep 15, 2025

Filed

vs. sector median

+27 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

Maine State AGbd_239543df911e11ae2025-09-15Verified
Oregon State AGbd_2784da27b9d225032025-09-15Verified
Washington State AGbd_4bf1c9fac6cb92602025-09-15Verified
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: Trusteed Plan Services Corporation
norm: trusteed plan

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

Discovered: Dec 26, 2024
Materiality determined: —
Notification sent: Sep 15, 2025
Affected individuals: 112state-resident count only
Data types: PIIIdentity (basic)Government IDMinor
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
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
Took steps to mitigate the risk of future harm
Provided access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Provided proactive fraud assistance through HaystackID
Changes made: Enhanced the security measures
Took steps to mitigate the risk of future harm
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 38 weeks(263 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

Washington State AGSep 15 · first

Indiana State AGSep 15 · first

Nebraska State AGSep 15 · first

California State AGSep 15 · first

Montana 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://dojmt.gov/wp-content/uploads/2025/09/Consumer-notification-letter-39.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: b4138a980c069a6dd82ccc9fb5aeb5695f42c1828b9cb93ca5e81b4488d64451

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityTrusteed Plan Services Corporation

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 provenancedojmt.gov