HackingFinancial ServicesFinanceVulnerability ExploitZero-DayData ExfiltratedSupply Chain (3P Vendor)Customer Data InvolvedPIIIdentity (basic)Financial accountLowContained

Leader Bank, National Association

bd_30e243e6974e83c5 · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 3, 2023

Filed

Sep 7, 2023

To disclose

5 weeks

Affected

58state residents only

Confidence

66%

Full breach record for Leader Bank, National Association →9 incidents on file

Leader Bank, N.A. notified the New Hampshire Attorney General of a data security incident involving its third-party vendor's MOVEit Transfer software. Unauthorized access occurred between May 27-31, 2023, leading to the exfiltration of client names and account numbers. 58 New Hampshire residents were affected. Notices were sent on August 30, 2023. The bank implemented enhanced monitoring and provided identity theft protection services.

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Incident timeline

undetected · 68 days

discovery → filing · 5 weeks / 35 days

May 27, 2023

Begins

Aug 3, 2023

Discovered

Sep 7, 2023

Filed

vs. sector median

3 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed58 affectedView incident

Name: Leader Bank, National Association
norm: leader bank national
Domain: leaderbank.com

Name: Leader Bank, National Association
norm: leader bank national
Domain: leaderbank.com
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: 58state-resident count only
Data types: PIIIdentity (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 Office of the Attorney General, New HampshireVendor advised the Department of Treasury
Initial access: exploit_public_facing

During the incident: Conducted own review of the files impacted
Engaged in follow up conversations with the vendor
Implemented enhanced monitoring protocols with respect to all affected accounts
Hiring additional personnel to allow for more detailed fraud and transaction monitoring
Engaging a dark web monitoring service
Provided free identity theft protection services as offered by Kroll
Changes made: Vendor remediated all technical vulnerabilities and patched systems in accordance with the MOVEit software provider’s guidelines
Vendor mobilized a technical response team to examine the relevant MOVEit Transfer systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(35 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://mm.nh.gov/files/uploads/doj/remote-docs/leader-bank-20230907.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 7, 2023
Raw hash: 49a8ff4ce63f31567b4205492e86038826d65a76eadd6fbaf9df576259240cb4

Reporting entityLeader Bank, National Association

Victim entityLeader Bank, National Association

Incidentdiscovered Aug 3, 2023

Stated responseConducted own review of the files impacted

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov