Social EngineeringOtherPhishingStolen CredentialsSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

John Brown & Sons, Inc.

bd_d1ebb31f2bdc158c · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 25, 2025

Filed

Oct 1, 2025

To disclose

6 days

Affected

40state residents only

Confidence

67%

John Brown & Sons, Inc. notified NH AG of a data incident discovered Sept 25, 2025. An unauthorized third party gained access via phishing to systems including Paycor (payroll provider). Data exposed: employee names, addresses, SSNs, and financial account info. 40 NH residents affected. Notices mailed Sept 26, 2025. Access wiped, passwords changed.

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Leak gap clock⏱ Leak >30d6 days discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

discovery → filing · 6 days

Sep 25, 2025

Discovered

Oct 1, 2025

Filed

vs. sector median

7 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed40 affectedView incident

A leak claim by sinobi about this victim predates this filing by 48 days.View originating leak claim

Name: Wadleigh, Starr & Peters, P.L.L.C.
norm: wadleigh starr peters

Name: John Brown & Sons, Inc.
norm: john brown sons
Domain: jbbrown.com
Industry: Otherllm

Discovered: Sep 25, 2025
Materiality determined: —
Notification sent: Sep 26, 2025
Affected individuals: 40state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Office of the Attorney General
Third party: via Paycor
Initial access: phishing_link

During the incident: Notified its third-party IT company, LAN Network Connections, Inc.
LAN Network Connections, Inc. conducted a review of the computer in question
Wiped out the third party's access
Changed all relevant passwords
Mailed written notices of this incident to the potentially impacted individuals via U.S. mail
Changes made: Working with LAN Network Connections, Inc to prevent a similar event from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 days(6 days from discovery to filing)
Compliance flags: Leak >30d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

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/john-brown-sons-20251001.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 1, 2025
Raw hash: 7f2e6d3315f6b1c40d2a35f288f5978745fe984a35c4ea09715306f8fb87e785

Reporting entityWadleigh, Starr & Peters, P.L.L.C.

Victim entityJohn Brown & Sons, Inc.

Incidentdiscovered Sep 25, 2025

Stated responseNotified its third-party IT company, LAN Network Connections, Inc.

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov