HackingIdentity (basic)Government IDFinancial accountMediumContained

Legacy Professionals, LLP

bd_348f472909d954c8 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Apr 30, 2024

Filed

Feb 27, 2025

To disclose

—

Affected

848state residents only

Linked

13 filings

Confidence

67%

Full breach record for Legacy Professionals, LLP →

Legacy Professionals, LLP, an accounting firm, notified Nebraska residents that unauthorized actors accessed files from its servers in late April 2024. The breach affected 848 Nebraska residents, exposing names, Social Security numbers, and financial account information. Legacy engaged forensic investigators, notified federal law enforcement, and provided 24 months of credit monitoring. The investigation confirmed data exfiltration in November 2024, with notifications sent starting February 27, 2025.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d

Incident timeline

Apr 30, 2024

Discovered

Feb 27, 2025

Filed

This filing is one of 13 about the same incident.View merged incident

A leak claim by lockbit_3 about this victim predates this filing by 300 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Iowa State AGbd_57931229329098382025-02-27Verified
Indiana State AGbd_6a3248ad6530de472025-02-27Verified
HHS OCRbd_182272a7ffb5a97d2025-02-28 · +1dVerified by operator
New Hampshire State AGbd_2b2c9c813c33d3412025-02-28 · +1dVerified

Show 6 more filings ↓up to 71d gap

Maine State AGbd_3e4130a7434eb9ad2025-02-28 · +1dVerified
California State AGbd_668ab37ff5d363e42025-02-28 · +1dVerified
Massachusetts State AGbd_82d3ee4a1c2164892025-02-28 · +1dVerified
Maryland State AGbd_e36cc97a1f40851d2025-02-28 · +1dVerified
Montana State AGbd_f2771bcbb0bec0722025-02-28 · +1dVerified
Washington State AGbd_052763491bdaac522025-05-09 · +71dVerified

Showing first 10 of 12 linked disclosures.

Name: Legacy Professionals, LLP
norm: legacy professionals
Domain: legacycpas.com

Name: Legacy Professionals, LLP
norm: legacy professionals
Domain: legacycpas.com

Discovered: Apr 30, 2024
Materiality determined: —
Notification sent: Feb 27, 2025
Affected individuals: 848state-resident count only
Data types: Identity (basic)Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Provided written notice of this incident to relevant state and federal regulatorsProvided notice to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Initial access: valid_credentials

During the incident: Retained Mullen Coughlin as privacy counsel
Engaged a third-party digital forensic investigation firm
Conducted a time-intensive and thorough programmatic and manual review of the impacted data set
Retained a third-party notification services provider
Provided written notice to eight hundred forty-eight (848) Nebraska residents
Notified federal law enforcement regarding the event
Provided access to credit monitoring services for two (2) years through IDX
Changes made: Implemented additional safeguards and training to its employees
Ensured the unauthorized access had been terminated
Implemented even more stringent access controls
Source: Quoted from the filing itself, not independently verified.

Compliance flags: Leak >180d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 11 states

View merged incident ↗

Iowa State AGFeb 27 · first

Indiana State AGFeb 27 · first

Nebraska State AGFeb 27 · first · this page

HHS OCR+1d

New Hampshire State AG+1d

Maine State AG+1d

California State AG+1d

Massachusetts State AG+1d

Maryland State AG+1d

Montana State AG+1d

Washington State AG+71d

Pattern: first filing Feb 27 (IA), last May 9 (WA) — a 71-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 12 — the full spread may be wider.

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://nebraska.gov/ago/data-breach/documents/Legacy Professionals - Notice of Data Event - NE.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 27, 2025
Raw hash: c9466d2b0334ce94b50e5d472e372638ae843e5b635e211a052fb0a8e1563408

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityLegacy Professionals, LLP

Victim entityLegacy Professionals, LLP

Incidentdiscovered Apr 30, 2024

Stated responseRetained Mullen Coughlin as privacy counsel

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancenebraska.gov