DisclosureLens
Social EngineeringFinancial ServicesFinancePhishingBECTargetedPIIIdentity (basic)LowContained

MountainOne

bd_cffdd270fbaaf2e4 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 29, 2022

Filed

Dec 9, 2022

To disclose

19 weeks

Affected

3state residents only

Linked

4 filings

Confidence

66%
Full breach record for MountainOne

MountainOne notified Montana residents of a business email compromise affecting two employee email accounts between July 29 and August 10, 2022. The incident involved unauthorized access via phishing, leading to potential exposure of names and other personal information. MountainOne secured the accounts, engaged forensic investigators, and offered one year of Equifax Credit Watch Gold to affected individuals.

Incident timeline

discovery → filing · 19 weeks / 133 days

Jul 29, 2022

Begins

Jul 29, 2022

Discovered

Dec 9, 2022

Filed

vs. sector median

+10 wks slower

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Filing propagation · 4 filings · 4 states

View merged incident ↗
Indiana State AGDec 9 · first
Montana State AGDec 9 · 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.