Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsCustomer Data InvolvedMulti-Stage ChainPIIIdentity (basic)LowContained

Cornerstone Bank

bd_e70bac0b80922c9b · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 10, 2024

Filed

Nov 4, 2024

To disclose

17 weeks

Affected

6state residents only

Linked

3 filings

Confidence

66%

Full breach record for Cornerstone Bank →2 incidents on file

Cornerstone Bank notified the NH AG of a phishing incident discovered July 10, 2024, affecting employee email accounts. Unauthorized access to a small number of accounts exposed PII of 6 New Hampshire residents. The bank engaged forensic specialists, secured systems, reported to federal law enforcement, and sent notices on Oct 31, 2024, offering credit monitoring.

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Incident timeline

discovery → filing · 17 weeks / 117 days

Jul 10, 2024

Discovered

Sep 24, 2024

Scope determined

Nov 4, 2024

Filed

vs. sector median

+8 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_8d890d7becda9f502024-11-05 · +1dVerified
Montana State AGbd_a1a155190343bd402024-11-05 · +1dCandidate

Name: Cornerstone Bank
norm: cornerstone bank

Name: Cornerstone Bank
norm: cornerstone bank
Industry: Financial Servicesllm

Discovered: Jul 10, 2024
Materiality determined: Sep 24, 2024
Notification sent: Oct 31, 2024
Affected individuals: 6state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Office of the Attorney General
Initial access: phishing_link

During the incident: Engaged third-party forensic specialists to investigate
Secured email system and network
Reported incident to federal law enforcement
Sent written notice to potentially impacted residents
Offered complimentary credit monitoring and identity theft protection services
Changes made: Secured email system and network
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 weeks(117 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

New Hampshire State AGNov 4 · first · this page

Massachusetts State AG+1d

Montana State AG+1d

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/cornerstone-bank-20241104.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 4, 2024
Raw hash: 81d30f187b675b1a644122c77e8436ecee1519bd23755491692c162add1bcb35

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityCornerstone Bank

Victim entityCornerstone Bank

Incidentdiscovered Jul 10, 2024

Stated responseEngaged third-party forensic specialists to investigate

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov