Social EngineeringFinancial ServicesFinancePhishingCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHealth (basic)MediumContained

The First National Bank of Sonora

bd_e0858e666c271f43 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 11, 2020

Filed

Nov 23, 2020

To disclose

15 weeks

Affected

1state residents only

Linked

2 filings

Confidence

66%

Full breach record for The First National Bank of Sonora →

First Sonora Bank notified the New Hampshire Attorney General of a data security incident affecting one NH resident. An unauthorized third party accessed an employee's email account between June 1 and August 10, 2020, potentially obtaining personal information including SSN, driver's license, financial account, and health data. The bank secured the account, engaged forensic investigators, and offered one year of credit monitoring.

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Incident timeline

undetected · 71 days

discovery → filing · 15 weeks / 104 days

Jun 1, 2020

Begins

Aug 11, 2020

Discovered

Nov 23, 2020

Filed

vs. sector median

+7 wks slower

This filing is one of 2 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Montana State AGbd_6df72648a4ce74762020-11-20 · +3dCandidate

Name: The First National Bank of Sonora
norm: the first national bank of sonora

Name: The First National Bank of Sonora
norm: the first national bank of sonora
Industry: Financial Servicesllm

Discovered: Aug 11, 2020
Breach occurred: Jun 1, 2020 – Aug 10, 2020
Undetected for: 71 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 20, 2020
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)
Data elements: Social Security number
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing Link
Threat actor: External
Initial access: phishing_link

During the incident: Secured the email account to prevent further access
Engaged a forensic security firm to investigate and confirm the security of its email and computer systems
Changes made: Enhancing existing security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(104 days from discovery to filing)
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 AGNov 20 · first

New Hampshire State AG+3d · 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/first-sonora-bank-20201123.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 23, 2020
Raw hash: 08b576974b2e40b0cc2e961b92c2d3b20ee0c733f6678a9915c6c2efe0c23184

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityThe First National Bank of Sonora

Victim entityThe First National Bank of Sonora

Incidentdiscovered Aug 11, 2020

Stated responseSecured the email account to prevent further access

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov