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.

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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

vs. sector median

on median

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

New Hampshire State AGbd_fe1aacb9ca1439922021-12-06Verified
Massachusetts State AGbd_d8b45c2be2cb29482021-12-07 · +1dVerified

Name: Komatsu America Corp.
norm: komatsu america

Name: Komatsu America Corp.
norm: komatsu america
Industry: Manufacturingllm

Discovered: Sep 22, 2021
Breach occurred: Sep 20, 2021
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 6, 2021
Affected individuals: 407state + nationwide
Data types: Identity (basic)Financial accountFinancial credentials
Data elements: Financial account number
Attack vector: Phishing
MITRE ATT&CK: T1566 Phishing
Threat actor: ExternalFinancial

During the incident: Notified affected individuals in writing
Offered 12 months of IDX identity protection services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(75 days from discovery to filing)
Compliance flags: ME AG >30d · 75d
Discovery-date grounding: 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.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Sep 22, 2021
→ Filed with AG: Dec 6, 2021
75d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Sep 22, 2021 → Filed with AG: Dec 6, 2021	75d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

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.

Source URL: https://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/fb31a0e5-f8ae-4f56-8512-3bc1ee724cfa.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 6, 2021
Raw hash: 3fa246a882df52fa80eea521665cbf297e97072ee87a3b07d275277c93a84c3f

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityKomatsu America Corp.

Victim entityKomatsu America Corp.

Incidentdiscovered Sep 22, 2021

Stated responseNotified affected individuals in writing

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov