HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)Government IDFinancial accountMediumContained

MISSION BANK

bd_36afb6655f680ae2 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 2, 2024

Filed

Jan 7, 2025

To disclose

5 weeks

Affected

25state residents only

Linked

5 records

Confidence

66%

Full breach record for MISSION BANK →2 incidents on file

Mission Bank notified Montana residents of a network security incident on December 2, 2024, where an unauthorized party accessed systems. Personal information including SSNs, DOBs, driver's licenses, and financial account numbers were potentially exposed. The bank isolated systems, engaged forensic specialists, notified law enforcement, and offered 12 months of credit monitoring.

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Incident timeline

discovery → filing · 5 weeks / 36 days

Dec 2, 2024

Begins

Dec 2, 2024

Discovered

Jan 7, 2025

Filed

vs. sector median

3 wks faster

This filing is one of 5 records about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteransomhubbd_d54f57ee18d6f5302025-01-23 · +16dCandidate

Regulatory filings (3) · sorted by filing gap

California State AGbd_7c5f8b4a3c098d282025-01-07Verified
New Hampshire State AGbd_1ec0ec35daba041a2025-01-22 · +15dVerified
Maine State AGbd_2e038e092086f93a2025-01-22 · +15dVerified by operator

Name: MISSION BANK
norm: mission bank
Domain: missionbank.bank

Name: MISSION BANK
norm: mission bank
Domain: missionbank.bank
Industry: Financial Servicesllm

Discovered: Dec 2, 2024
Breach occurred: Dec 2, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 31, 2024
Affected individuals: 25state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Notified law enforcement
Initial access: valid_credentials

During the incident: Isolating the impacted systems
Engaged third-party forensic specialists to investigate the incident
Notified law enforcement
Changes made: Reviewing technical safeguards and looking into enhancements to prevent a similar incident
Providing you with access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Providing you with proactive fraud assistance
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(36 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

California State AGJan 7 · first

Montana State AGJan 7 · first · this page

New Hampshire State AG+15d

Maine State AG+15d

Pattern: first filing Jan 7 (CA), last Jan 22 (ME) — a 15-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/2025/01/Consumer-notification-letter-24.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 7, 2025
Raw hash: 7ad318018c5b427d4029f88e8d3976a13783c7a39b46486ed3a8390b23b98520

Linked disclosures

Ransomware claims (1)

Regulatory filings (3) · sorted by filing gap

Reporting entityMISSION BANK

Victim entityMISSION BANK

Incidentdiscovered Dec 2, 2024

Stated responseIsolating the impacted systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov