HackingFinancial ServicesFinanceVulnerability ExploitZero-DayData ExfiltratedSupply Chain (3P Vendor)Identity (basic)Government IDFinancial accountMediumContained

Kirkwood Bank & Trust Co.

bd_ce8c7f33bcccefae · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Dec 7, 2023

To disclose

—

Affected

59state residents only

Linked

2 filings

Confidence

66%

Full breach record for Kirkwood Bank & Trust Co. →

Kirkwood Bank & Trust notified Montana residents of a data incident involving its third-party vendor, Fiserv. An unauthorized party exploited a previously unknown vulnerability (zero-day) in Fiserv's MOVEit Transfer application between May 27-31, 2023, to exfiltrate customer data including names, DOBs, SSNs, and account numbers. Kirkwood activated its incident response program and offered 24 months of identity protection.

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Incident timeline

May 27, 2023

Begins

Dec 7, 2023

Filed

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

Maine State AGbd_bd9fb0b56518a2442023-12-08 · +1dVerified by operator

Name: Kirkwood Bank & Trust Co.
norm: kirkwood bank

Name: Kirkwood Bank & Trust Co.
norm: kirkwood bank
Industry: Financial Servicesllm

Discovered: —
Breach occurred: May 27, 2023 – May 31, 2023
Materiality determined: —
Notification sent: Sep 25, 2023
Affected individuals: 59state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
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: Activated our Incident Response Program
Partnering with Kroll Identity Monitoring to offer you 24 months of complimentary identity protection services
Changes made: Vendor has remediated all technical vulnerabilities and patched systems in accordance with the MOVEit software provider’s guidelines
Mobilized a technical response team to examine the relevant MOVEit systems to ensure that there were no further vulnerabilities
Source: Quoted from the filing itself, not independently verified.

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 ↗

Montana State AGDec 7 · first · this page

Maine State AG+1d

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-925.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 7, 2023
Raw hash: e5b792e3ef04ac4b2460f43a8e683221c21de04800760d9924b6a5cd8f82adbd

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityKirkwood Bank & Trust Co.

Victim entityKirkwood Bank & Trust Co.

IncidentThird-Party / Supply Chain

Stated responseActivated our Incident Response Program

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov