HackingFinancial ServicesFinanceVulnerability ExploitData ExfiltratedSupply Chain (3P Vendor)Identity (basic)Financial accountLowContained

First National Bankers Bankshares Inc

bd_e2c60f5dfad10135 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 10, 2023

Filed

Aug 2, 2023

To disclose

23 days

Affected

1state residents only

Confidence

66%

Full breach record for First National Bankers Bankshares Inc →

BOM Bank notified Montana customers of a data breach involving First National Bankers Bankshares (FNBB). FNBB's MOVEit Transfer software was exploited by an unauthorized third party on May 27, 2023. The breach exposed check images, routing numbers, and checking account numbers. BOM Bank applied patches, engaged forensic experts, and notified law enforcement. Discovery occurred around July 10, 2023.

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Incident timeline

undetected · 44 days

discovery → filing · 23 days

May 27, 2023

Begins

Jul 10, 2023

Discovered

Aug 2, 2023

Filed

vs. sector median

5 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: BOM Bank
norm: bom bank

Name: First National Bankers Bankshares Inc
norm: first national bankers bankshares
Industry: Financial Servicesllm

Discovered: Jul 10, 2023
Breach occurred: May 27, 2023
Undetected for: 44 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 2, 2023
Affected individuals: 1state-resident count only
Data types: Identity (basic)Financial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Law enforcement notifiedFederal regulators notified
Third party: via First National Bankers Bankshares, Inc.
Initial access: exploit_public_facing

During the incident: Applied software patches issued by the provider of MOVEit
Notified law enforcement
Began investigating the issue with the assistance of data forensic experts
Conducted a manual review of the records to confirm the identities of individuals potentially affected
Law enforcement and federal regulators have been notified
Changes made: Evaluating procedures with respect to service providers
Revisiting cybersecurity standards for service providers
Reviewing and updating security policies and incident response plans
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 23 days(23 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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-507.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 2, 2023
Raw hash: 549a02521ea7b49d57e064b6b6bbf5950f9b3893338b903783eab53dccbc81c5

Reporting entityBOM Bank

Victim entityFirst National Bankers Bankshares Inc

Incidentdiscovered Jul 10, 2023

Stated responseApplied software patches issued by the provider of MOVEit

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov