Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)Government IDMediumContained

Montana Bankers Association

bd_08a66d98e77727d1 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 29, 2023

Filed

Jun 13, 2023

To disclose

11 weeks

Affected

16state residents only

Linked

2 filings

Confidence

65%

Full breach record for Montana Bankers Association →

Montana Bankers Association notified Montana residents of a data breach involving unauthorized access to an employee email account between March 29-30, 2023. The incident exposed names and Social Security numbers. No evidence of misuse was found. The organization engaged forensic investigators and offered one year of Experian Identity Works.

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Incident timeline

discovery → filing · 11 weeks / 76 days

Mar 29, 2023

Begins

Mar 29, 2023

Discovered

Jun 13, 2023

Filed

vs. sector median

+2 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

Indiana State AGbd_4c268b51c329ddfe2023-06-12 · +1dVerified

Name: Montana Bankers Association
norm: montana bankers
Domain: montanabankers.com

Name: Montana Bankers Association
norm: montana bankers
Domain: montanabankers.com
Industry: Financial Servicesllm

Discovered: Mar 29, 2023
Breach occurred: Mar 29, 2023 – Mar 30, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 12, 2023
Affected individuals: 16state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: External
Initial access: phishing_link

During the incident: Secured the email account
Began an internal investigation
Engaged a forensic security firm to investigate
Offering a complimentary one-year membership of Experian Identity Works Credit 3B
Changes made: Enhancing our technical security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(76 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 ↗

Indiana State AGJun 12 · first

Montana State AG+1d · 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/OCP/Consumer-notification-letter-348.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 13, 2023
Raw hash: da1842fc03d0c212e5afb728d336e6cd9fa9eb35354b7714089ff286838c8921

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMontana Bankers Association

Victim entityMontana Bankers Association

Incidentdiscovered Mar 29, 2023

Stated responseSecured the email account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov