HackingFinancial ServicesFinanceStolen CredentialsData ExfiltratedTargetedIdentity (basic)Government IDMediumContained

Mountain West Commercial, LLC

bd_702d64f5996752b2 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 14, 2025

Filed

Dec 18, 2025

To disclose

18 weeks

Affected

8state residents only

Linked

2 filings

Confidence

65%

Full breach record for Mountain West Commercial, LLC →

Mountain West Commercial, LLC notified Montana residents of unauthorized access to its IT network between August 14-16, 2025. An unknown actor downloaded data including names and government identifiers. The company reported the incident to federal law enforcement, secured its network, and is offering credit monitoring services to affected individuals.

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Incident timeline

discovery → filing · 18 weeks / 126 days

Aug 14, 2025

Begins

Aug 14, 2025

Discovered

Dec 18, 2025

Filed

vs. sector median

+9 wks slower

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_09f37490c134958b2025-12-18Verified

Name: Mountain West Commercial, LLC
norm: mountain west commercial

Name: Mountain West Commercial, LLC
norm: mountain west commercial
Industry: Financial Servicesllm

Discovered: Aug 14, 2025
Breach occurred: Aug 14, 2025 – Aug 16, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 18, 2025
Affected individuals: 8state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Reported the event to federal law enforcement
Initial access: valid_credentials

During the incident: Immediately launched an investigation to determine the nature and scope of the event
Worked quickly to ensure our network was secure
Reported the event to federal law enforcement
Conducted a comprehensive review of information viewed during the event
Offering you access to 12 / 24 months of complimentary credit monitoring and identity restoration services through IDX
Changes made: Reviewed our existing policies and procedures to further enhance our information security posture
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 weeks(126 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGDec 18 · first

Montana State AGDec 18 · 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/2026/03/Consumer-notification-letter-13.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 18, 2025
Raw hash: 9acb1224d3b4be66e0d7b79ed9ba172d47eb85c5af6e453f5d753691148fd1d1

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMountain West Commercial, LLC

Victim entityMountain West Commercial, LLC

Incidentdiscovered Aug 14, 2025

Stated responseImmediately launched an investigation to determine the nature and scope of the event

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov