HackingProfessional ServicesProfessional ServicesCapture Stored DataData ExfiltratedCustomer Data InvolvedTargetedPIIIdentity (basic)Government IDMediumContained

Legacy Professionals, LLP

bd_2b2c9c813c33d341 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 1, 2024

Filed

Feb 28, 2025

To disclose

48 weeks

Affected

94state residents only

Linked

13 filings

Confidence

66%

Full breach record for Legacy Professionals, LLP →

Legacy Professionals, LLP, an accounting firm, disclosed a data breach affecting 94 New Hampshire residents. The firm detected suspicious activity in late April 2024, leading to the discovery that an unauthorized actor exfiltrated files from its servers. The firm terminated access, notified federal law enforcement, and provided 24 months of credit monitoring to affected individuals. Notices were sent in late February 2025.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d48 weeks discovery → filing

Incident timeline

discovery → filing · 48 weeks / 333 days

Apr 1, 2024

Discovered

Jan 31, 2025

Scope determined

Feb 28, 2025

Filed

vs. sector median

+29 wks slower

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 301 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

HHS OCRbd_182272a7ffb5a97d2025-02-28Verified by operator
Maine State AGbd_3e4130a7434eb9ad2025-02-28Verified
California State AGbd_668ab37ff5d363e42025-02-28Verified
Massachusetts State AGbd_82d3ee4a1c2164892025-02-28Verified

Show 6 more filings ↓up to 70d gap

Maryland State AGbd_e36cc97a1f40851d2025-02-28Verified
Montana State AGbd_f2771bcbb0bec0722025-02-28Verified
Nebraska State AGbd_348f472909d954c82025-02-27 · +1dVerified
Iowa State AGbd_57931229329098382025-02-27 · +1dVerified
Indiana State AGbd_6a3248ad6530de472025-02-27 · +1dVerified
Washington State AGbd_052763491bdaac522025-05-09 · +70dVerified

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
Industry: Professional Servicesllm

Discovered: Apr 1, 2024
Materiality determined: Jan 31, 2025
Notification sent: Feb 27, 2025
Affected individuals: 94state-resident count only
Data types: PIIIdentity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified federal law enforcement regarding the eventProvided written notice of this incident to relevant state and federal regulatorsProvided written notice to the three major credit reporting agencies, Equifax, Experian, and TransUnion

During the incident: Moved quickly to investigate and respond to the incident
Assessed the security of Legacy systems
Identified potentially affected individuals
Notified federal law enforcement regarding the event
Implemented additional safeguards and training to its employees
Provided access to credit monitoring services for through IDX
Provided impacted individuals with guidance on how to better protect against identity theft and fraud
Provided written notice of this incident to relevant state and federal regulators
Provided written notice to the three major credit reporting agencies
Ensured the unauthorized access had been terminated
Began investigating what happened
Reported this event to federal law enforcement
Implemented even more stringent access controls
Offering 24 months of credit monitoring and identity theft protection services through IDX
Changes made: Implemented even more stringent access controls
Implemented additional safeguards and training to its employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 48 weeks(333 days from discovery to filing)
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 ↗

Nebraska State AGFeb 27 · first

Iowa State AGFeb 27 · first

Indiana State AGFeb 27 · first

HHS OCR+1d

Maine State AG+1d

California State AG+1d

Massachusetts State AG+1d

Maryland State AG+1d

Montana State AG+1d

New Hampshire State AG+1d · this page

Washington State AG+71d

Pattern: first filing Feb 27 (NE), 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://mm.nh.gov/files/uploads/doj/remote-docs/legacy-professionals-20250228.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 28, 2025
Raw hash: b502664baf5acab72e229567c3ca66daccbe191d6943ea55ec8af507c5ab9426

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityLegacy Professionals, LLP

Victim entityLegacy Professionals, LLP

Incidentdiscovered Apr 1, 2024

Stated responseMoved quickly to investigate and respond to the incident

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov