Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)Financial accountLowContained

West Plains Bank and Trust Company

bd_fb47569767581d5e · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 18, 2021

Filed

Jan 18, 2022

To disclose

9 weeks

Affected

1state residents only

Linked

5 filings

Confidence

66%

Full breach record for West Plains Bank and Trust Company →

West Plains Bank and Trust Company notified the NH AG of unauthorized access to an employee email account from Aug 14 to Sep 7, 2021. Suspicious activity was detected, leading to an investigation by forensic specialists. One NH resident's name, address, account, and routing numbers were accessed. Notification sent Jan 12, 2022, with credit monitoring offered.

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Incident timeline

undetected · 96 days

discovery → filing · 9 weeks / 61 days

Aug 14, 2021

Begins

Nov 18, 2021

Discovered

Jan 18, 2022

Filed

vs. sector median

+1 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Indiana State AGbd_200287936abec7be2022-01-12 · +6dVerified
Maine State AGbd_6b5bda52c338bb0f2022-01-12 · +6dCandidate
Massachusetts State AGbd_75458e6f4c4dccaa2022-01-12 · +6dVerified
Montana State AGbd_e21baa142e2152572022-03-10 · +51dVerified by operator

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: West Plains Bank and Trust Company
norm: west plains bank and
Industry: Financial Servicesllm

Discovered: Nov 18, 2021
Breach occurred: Aug 14, 2021 – Sep 7, 2021
Undetected for: 96 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 12, 2022
Affected individuals: 1state-resident count only
Data types: Identity (basic)Financial account
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Launched an investigation with the assistance of third-party forensic specialists
Reviewed the contents of the affected account
Moved quickly to investigate and respond to the incident
Assessed the security of West Plains systems
Notified potentially affected individuals
Changing the password for the affected account
Changes made: Implementing additional safeguards and training to its employees
Reviewing policies and procedures relating to data privacy and security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(61 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 ↗

Indiana State AGJan 12 · first

Maine State AGJan 12 · first

Massachusetts State AGJan 12 · first

New Hampshire State AG+6d · this page

Montana State AG+57d

Pattern: first filing Jan 12 (IN), last Mar 10 (MT) — a 57-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://mm.nh.gov/files/uploads/doj/remote-docs/west-plains-bank-trust-20220118.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 18, 2022
Raw hash: acf98ccd9c754628868f95298963eef7c1eb280d6adbf43d8f4a5c995b76b021

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityWest Plains Bank and Trust Company

Incidentdiscovered Nov 18, 2021

Stated responseLaunched an investigation with the assistance of third-party forensic specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov