HackingFinancial ServicesFinanceVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Financial accountLowContained

Pinnacle Bank Wyoming

bd_69b6da9972cea00f · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 9, 2023

Filed

Dec 8, 2023

To disclose

9 weeks

Affected

4state residents only

Linked

2 filings

Confidence

65%

Full breach record for Pinnacle Bank Wyoming →

Pinnacle Bank Wyoming notifies Montana residents of a third-party data breach involving its vendor's MOVEit Transfer software. Unauthorized actors accessed files containing names, bank account numbers, and routing numbers between May 27-31, 2023. The bank was notified on October 9, 2023, and offered two years of Kroll identity monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 135 days

discovery → filing · 9 weeks / 60 days

May 27, 2023

Begins

Oct 9, 2023

Discovered

Dec 8, 2023

Filed

vs. sector median

on median

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_c0c5ff1a6722e1a72023-12-08Verified

Name: Pinnacle Bank Wyoming
norm: pinnacle bank wyoming

Name: Pinnacle Bank Wyoming
norm: pinnacle bank wyoming
Industry: Financial Servicesllm

Discovered: Oct 9, 2023
Breach occurred: May 27, 2023 – May 31, 2023
Undetected for: 135 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 9, 2023
Affected individuals: 4state-resident count only
Data types: Identity (basic)Financial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: notified regulatory bodies as required
Initial access: exploit_public_facing

During the incident: Launched a comprehensive investigation
Identify individuals affected
Notified regulatory bodies as required
Arranged for you to receive a complimentary free identity monitoring service through Kroll for two years
Changes made: Service provider has remediated all technical vulnerabilities
Patched systems in accordance with the MOVEit software provider’s guidelines
Mobilized a technical response team to examine the relevant MOVEit Transfer systems and ensure that there were no further vulnerabilities
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(60 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 8 · first

Montana State AGDec 8 · 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/OCP/Consumer-notification-letter-932.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 8, 2023
Raw hash: 488577fa02478bc9031b59763e7be6fb93cf2fd19176b2c7a869843ac960b1c7

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityPinnacle Bank Wyoming

Victim entityPinnacle Bank Wyoming

Incidentdiscovered Oct 9, 2023

Stated responseLaunched a comprehensive investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov