HackingProfessional ServicesProfessional ServicesSupply Chain (3P Vendor)Customer Data InvolvedData ExfiltratedPIIIdentity (basic)LowContained

McNeill Baur PLLC

bd_61793d8f5733fd44 · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 30, 2023

Filed

Feb 6, 2024

To disclose

10 weeks

Affected

1state residents only

Linked

2 filings

Confidence

66%

Full breach record for McNeill Baur PLLC →

McNeill Baur PLLC reported a third-party data security incident involving its payroll vendor, Paycor. Paycor experienced a breach via the MOVEit software vulnerability, resulting in the unauthorized download of files containing personal information for some current and former employees on or around May 31, 2023. McNeill Baur learned of the incident on November 30, 2023. One New Hampshire resident was notified. McNeill Baur partnered with Experian to provide complimentary identity monitoring and credit monitoring services to affected individuals.

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Incident timeline

undetected · 183 days

discovery → filing · 10 weeks / 68 days

May 31, 2023

Begins

Nov 30, 2023

Discovered

Feb 6, 2024

Filed

vs. sector median

9 wks faster

This filing is one of 2 about the same incident.View merged incident

Part of Paycor supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_bf92e0f828596bb12024-02-06Verified

Name: McNeill Baur PLLC
norm: mcneill baur
Domain: mcneillbaur.com

Name: McNeill Baur PLLC
norm: mcneill baur
Domain: mcneillbaur.com
Industry: Professional Servicesllm

Discovered: Nov 30, 2023
Breach occurred: May 31, 2023
Undetected for: 183 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 22, 2023
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Notified Attorney General John M. Formella
Third party: via Paycor
Initial access: supply_chain

During the incident: Partnering with Experian to provide access to complimentary identity monitoring services
Providing $1 million identity theft insurance coverage
Providing fully managed identity restoration services
Issuing notification letters to affected individuals
Changes made: Partnering with Experian to provide access to complimentary identity monitoring services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(68 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGFeb 6 · first

New Hampshire State AGFeb 6 · first · this page

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/mcneill-baur-20240206.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 6, 2024
Raw hash: 844bbf76b518144b0cd125746fa60d1fcada8807a12e5423d8d31e5074b9900a

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMcNeill Baur PLLC

Victim entityMcNeill Baur PLLC

Incidentdiscovered Nov 30, 2023

Stated responsePartnering with Experian to provide access to complimentary identity monitoring services

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov