HackingManufacturingManufacturingStolen CredentialsPhishingTargetedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Komatsu America Corp.

bd_fe1aacb9ca143992 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 22, 2021

Filed

Dec 6, 2021

To disclose

11 weeks

Affected

2state residents only

Linked

3 filings

Confidence

66%

Full breach record for Komatsu America Corp. →

Komatsu America Corp. notified the New Hampshire Attorney General of a cybersecurity incident discovered on September 22, 2021. An unauthorized external actor used stolen credentials to access an employee's email account between September 20 and 22, 2021. The actor bypassed MFA and created malicious rules to hide inbound messages. While no evidence suggested data was accessed, the account contained PII, SSNs, and financial info. Two NH residents were notified on December 6, 2021, and offered 12 months of credit monitoring.

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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

Maine State AGbd_076fbb8f08f92a742021-12-06Candidate
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 – Sep 22, 2021
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 6, 2021
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1566.002 Spearphishing Link
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Engaged its internal experts and legal counsel to identify the scope of the incident
Forced a password reset for the impacted email account
Reset the MFA method
Removed all unauthorized rules
Reviewed a large volume of emails and attachments within the employee’s email account
Changes made: Provided the employee with re-training on MFA controls
Modifying the MFA challenge to a more secure method across the organization
Offered credit monitoring and identity theft protection services for a period of twelve (12) months
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(75 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 ↗

Maine State AGDec 6 · first

New Hampshire 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://mm.nh.gov/files/uploads/doj/remote-docs/komatsu-america-20211206.pdf
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: 4fa27ac7fafbfee6bf3296827f1e2b9975f1b0a5418bb24756378dfaae3430c7

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityKomatsu America Corp.

Victim entityKomatsu America Corp.

Incidentdiscovered Sep 22, 2021

Stated responseEngaged its internal experts and legal counsel to identify the scope of the incident

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov