Social EngineeringOtherPhishingStolen CredentialsCustomer Data InvolvedPIIIdentity (basic)LowContained

Grand HVAC Leasing USA, LLC

bd_609d929585943a49 · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 4, 2024

Filed

Jan 15, 2025

To disclose

15 weeks

Affected

Not disclosed

Confidence

64%

Full breach record for Grand HVAC Leasing USA, LLC →

Grand HVAC Leasing USA, LLC notified New Hampshire residents of a phishing incident where an unauthorized third party accessed an employee email account between Sept 25 and Oct 4, 2024. The attacker viewed emails containing customer PII. No misuse was detected. The company engaged forensic experts, contained the breach, and enhanced security protocols.

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Incident timeline

undetected · 9 days

discovery → filing · 15 weeks / 103 days

Sep 25, 2024

Begins

Oct 4, 2024

Discovered

Jan 15, 2025

Filed

vs. sector median

+7 wks slower

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

Name: Grand HVAC Leasing USA, LLC
norm: grand hvac leasing usa

Name: Grand HVAC Leasing USA, LLC
norm: grand hvac leasing usa
Industry: Otherllm

Discovered: Oct 4, 2024
Breach occurred: Sep 25, 2024 – Oct 4, 2024
Undetected for: 9 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 13, 2025
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Regulator citations: notified relevant state regulators
Initial access: phishing_link

During the incident: Launched a robust investigation into the nature and scope of the event with the assistance of external cyber security forensic experts
Taking steps to prevent any additional unauthorized activity
Taken measures to ensure that the unauthorized third party no longer has access to our systems
Reviewing our security protocols and have taken steps to further enhance security
Notified relevant state regulators
Changes made: Reviewing our security protocols and have taken steps to further enhance security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(103 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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/grand-hvac-leasing-usa-20250115.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 15, 2025
Raw hash: 0ccb9e8095b0c6d6f697bb0f7877b163ea50d75b7a178400c79855c3b840953a

Reporting entityGrand HVAC Leasing USA, LLC

Victim entityGrand HVAC Leasing USA, LLC

Incidentdiscovered Oct 4, 2024

Stated responseLaunched a robust investigation into the nature and scope of the event with the assistance of external cyber security forensic experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov