HackingFinancial ServicesFinanceVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedPIIIdentity (basic)CVE-2023-34362LowContained

Leader Bank, National Association

bd_2cb3a5106f844a23 · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 3, 2023

Filed

Aug 30, 2023

To disclose

27 days

Affected

1state residents only

Linked

5 filings

Confidence

65%

Full breach record for Leader Bank, National Association →8 incidents on file

Leader Bank, N.A. notified Montana residents of a data breach involving its vendor's use of MOVEit Transfer software. Unauthorized access occurred May 27-31, 2023, before the vulnerability was publicly disclosed. Affected data included names and bank account numbers. Leader Bank engaged in investigation, patched systems, and provided two years of Kroll identity monitoring.

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Incident timeline

undetected · 68 days

discovery → filing · 27 days

May 27, 2023

Begins

Aug 3, 2023

Discovered

Aug 30, 2023

Filed

vs. sector median

4 wks faster

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

Part of Progress Software Corporation supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Massachusetts State AGbd_70f048fb88f93d312023-08-30Verified
Maine State AGbd_8167850bea03b9e72023-08-30Verified
Vermont State AGbd_abc4a76a5ea1e65d2023-08-30Verified
New Hampshire State AGbd_30e243e6974e83c52023-09-07 · +8dVerified by operator

Name: Leader Bank, National Association
norm: leader bank national

Name: Leader Bank, National Association
norm: leader bank national
Industry: Financial Servicesllm

Discovered: Aug 3, 2023
Breach occurred: May 27, 2023 – May 31, 2023
Undetected for: 68 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 30, 2023
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
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
CVE references: CVE-2023-34362

During the incident: Launched a comprehensive investigation
Reviewed all files to identify individuals affected
Notified regulatory bodies as required
Implemented enhanced monitoring of any account number impacted by this incident
Arranged for complimentary free identity monitoring service through Kroll for two years
Changes made: 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: 27 days(27 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Massachusetts State AGAug 30 · first

Maine State AGAug 30 · first

Vermont State AGAug 30 · first

Montana State AGAug 30 · first · this page

New Hampshire State AG+8d

Pattern: first filing Aug 30 (MA), last Sep 7 (NH) — a 8-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/OCP/Consumer-notification-letter-617.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 30, 2023
Raw hash: 47bb723dfc38ab1b48983fe8014acdfcce39cd208a747eb66f8622b40de8fed0

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityLeader Bank, National Association

Victim entityLeader Bank, National Association

Incidentdiscovered Aug 3, 2023

Stated responseLaunched a comprehensive investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov