Social EngineeringRetail & ConsumerRetailPhishingStolen CredentialsTargetedPIIFinancial accountLowContained

Yonex Corporation

bd_7e1f303ef9fb4655 · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 26, 2022

Filed

Nov 21, 2022

To disclose

26 days

Affected

1state residents only

Linked

3 filings

Confidence

66%

Full breach record for Yonex Corporation →

Yonex Corporation notified Montana residents of a security incident where an unauthorized third party accessed four employee email accounts via phishing between June 9 and September 12, 2022. The attacker viewed names and credit card numbers. No data was downloaded. Yonex engaged forensic investigators, reset passwords, and implemented MFA.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 139 days

discovery → filing · 26 days

Jun 9, 2022

Begins

Oct 26, 2022

Discovered

Nov 21, 2022

Filed

vs. sector median

4 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Indiana State AGbd_469c4dae24e70b402022-11-21Verified
New Hampshire State AGbd_cf9e249c35c5a4d42022-11-21Verified

Name: Yonex Corporation
norm: yonex
Domain: yonexusa.net

Name: Yonex Corporation
norm: yonex
Domain: yonexusa.net
Industry: Retail & Consumerllm

Discovered: Oct 26, 2022
Breach occurred: Jun 9, 2022 – Sep 12, 2022
Undetected for: 139 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: PIIFinancial account
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Initiated an investigation
Hired an independent IT forensics firm to assess and remediate the incident
Re-set passwords
Implementing multi-factor authentication
Training and educating employees about potential cyber threats
Changes made: Implementing multi-factor authentication
Training and educating employees about potential cyber threats
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 26 days(26 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Indiana State AGNov 21 · first

New Hampshire State AGNov 21 · first

Montana State AGNov 21 · 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://dojmt.gov/wp-content/uploads/OCP/Consumer-Notification-Letter-729.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 21, 2022
Raw hash: 8f080de657316116b0bf2e8c37db261d6c523c015dbb6babf4fbab6b75c97883

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityYonex Corporation

Victim entityYonex Corporation

Incidentdiscovered Oct 26, 2022

Stated responseInitiated an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov