Social EngineeringFinancial ServicesFinancePhishingCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Limestone Bank, Inc.

bd_c83686cdeac36a3f · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 16, 2023

Filed

Sep 15, 2023

To disclose

4 weeks

Affected

26state residents only

Linked

6 filings

Confidence

66%

Full breach record for Limestone Bank, Inc. →

Limestone Bank (now Peoples Bank) notified the New Hampshire Attorney General of a cybersecurity incident involving unauthorized access to an employee email account. The breach occurred between November 21, 2022, and March 23, 2023. The bank determined on August 16, 2023, that personal information of 26 New Hampshire residents was compromised. Notifications were mailed on September 15, 2023, offering one year of credit monitoring.

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Incident timeline

undetected · 268 days

discovery → filing · 4 weeks / 30 days

Nov 21, 2022

Begins

Aug 16, 2023

Discovered

Sep 15, 2023

Filed

vs. sector median

4 wks faster

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Montana State AGbd_205d103bb61afbcd2023-09-15Candidate
Indiana State AGbd_479cf63665e980622023-09-15Verified
Maine State AGbd_5d3b964d889a8c142023-09-15Verified
Massachusetts State AGbd_67b3b5c396b298342023-09-15Verified

Show 1 more filing ↓

Vermont State AGbd_e69f36a77ffb01dd2023-09-15Verified

Name: Limestone Bank, Inc.
norm: limestone bank

Name: Limestone Bank, Inc.
norm: limestone bank
Industry: Financial Servicesllm

Discovered: Aug 16, 2023
Breach occurred: Nov 21, 2022 – Mar 23, 2023
Undetected for: 268 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 15, 2023
Affected individuals: 26state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified Attorney General John Formella
Initial access: phishing_link

During the incident: Took steps to secure the account
Began an investigation
A cybersecurity firm was engaged to assist
Mailed notification letters to the New Hampshire residents
Offering the New Hampshire residents one year of complimentary credit monitoring, fraud consultation and identity theft restoration services through Equifax
Established a toll-free call center
Changes made: Offering the New Hampshire residents one year of complimentary credit monitoring, fraud consultation and identity theft restoration services through Equifax
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 4 weeks(30 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 6 states

View merged incident ↗

Montana State AGSep 15 · first

Indiana State AGSep 15 · first

Maine State AGSep 15 · first

Massachusetts State AGSep 15 · first

Vermont State AGSep 15 · first

New Hampshire State AGSep 15 · 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://mm.nh.gov/files/uploads/doj/remote-docs/limestone-bank-peoples-bank-20230915.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 15, 2023
Raw hash: c8e2e551e54af51426e94f3621cd00864f10e8d83d7c8b52583f63050a7cc1bd

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityLimestone Bank, Inc.

Victim entityLimestone Bank, Inc.

Incidentdiscovered Aug 16, 2023

Stated responseTook steps to secure the account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov