DisclosureLens
Social EngineeringManufacturingManufacturingBECPhishingCustomer Data InvolvedData ExfiltratedIdentity (basic)Financial accountFinancial credentialsLowResolved

Komatsu America Corp.

bd_076fbb8f08f92a74 · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 22, 2021

Filed

Dec 6, 2021

To disclose

11 weeks

Affected · nationwide

4071 in this filing

Linked

3 filings

Confidence

65%
Full breach record for Komatsu America Corp. →

Komatsu America Corp. experienced a business email compromise incident on September 20, 2021, which was discovered two days later. The breach affected 407 individuals, exposing names and financial account or credit/debit card numbers along with their access codes. Komatsu began notifying affected individuals on December 6, 2021, and offered 12 months of identity protection services through IDX.

Maine clockDiscovered Sep 22, 2021 → Filed with AG Dec 6, 202175d ⏱ ME AG >30d11 weeks discovery → filing
⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 2 days
discovery → filing · 11 weeks / 75 days

Sep 20, 2021

Begins

Sep 22, 2021

Discovered

Dec 6, 2021

Filed

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

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Filing propagation · 3 filings · 3 states

View merged incident ↗
New Hampshire State AGDec 6 · first
Maine State AGDec 6 · first · this page
Massachusetts State AG+1d

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.