Social EngineeringRetail & ConsumerManufacturingRetailPhishingStolen CredentialsMulti-Stage ChainCustomer Data InvolvedPIIIdentity (basic)FinancialLowContained

Brunswick Corporation

bd_886ffd86dbb50291 · schema v1 · pii pii-v1

Severity

Low

Discovered

Apr 10, 2024

Filed

May 31, 2024

To disclose

7 weeks

Affected

1state residents only

Confidence

65%

Full breach record for Brunswick Corporation →4 incidents on file

Brunswick Corporation reported a phishing incident affecting a MarineMax employee. An attacker clicked a phishing link on March 27, 2024, hijacked the account, and accessed email files. The breach was detected on April 10, 2024. One New Hampshire resident's W9 data (business phone, email) was exposed. Remediation included password resets and credit monitoring offers.

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Leak gap clock⏱ Leak >90d7 weeks discovery → filing

Incident timeline

undetected · 14 days

discovery → filing · 7 weeks / 51 days

Mar 27, 2024

Begins

Apr 10, 2024

Discovered

May 14, 2024

Scope determined

May 31, 2024

Filed

vs. sector median

on median

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

A leak claim by toufan about this victim predates this filing by 164 days.View originating leak claim

Name: Brunswick Corporation
norm: brunswick
Domain: brunswick.com

Name: Brunswick Corporation
norm: brunswick
Domain: brunswick.com
Industry: Retail & ConsumerllmManufacturingllm

Discovered: Apr 10, 2024
Breach occurred: Mar 27, 2024 – Apr 10, 2024
Undetected for: 14 daysoccurrence → discovery
Materiality determined: May 14, 2024
Notification sent: May 28, 2024
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)Financial
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: Filed an 8-K filing breach notification with the US Securities and Exchange Commission (SEC)
Initial access: phishing_link

During the incident: The employee’s password was reset
Newly created email rules were removed
The VP’s password was reset, his tokens were revoked, and his sessions were reset
Five additional individuals had their passwords reset, their tokens revoked, and their session reset
Offered access to complimentary credit monitoring services through Experian IdentityWorks
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(51 days from discovery to filing)
Compliance flags: Leak >90d
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.

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/marinemax-searay-20240531.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 31, 2024
Raw hash: f08f9aa0345c2070a722dda1dc74b3824d2ee0009035a2067f47d268e70d5b6d

Reporting entityBrunswick Corporation

Victim entityBrunswick Corporation

Incidentdiscovered Apr 10, 2024

Stated responseThe employee’s password was reset

ComplianceLeak >90d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov