MalwareFinancial ServicesFinanceRansomwareCapture Stored DataData EncryptedData ExfiltratedCustomer Data InvolvedIdentity (basic)Financial accountLowContained

Horicon Bank

bd_1137e14623fb8bef · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 20, 2021

Filed

Nov 22, 2021

To disclose

9 weeks

Affected

2state residents only

Linked

4 filings

Confidence

66%

Full breach record for Horicon Bank →

Horicon Bank experienced a ransomware incident on September 20, 2021, where an unauthorized third party accessed and encrypted non-core banking systems. Personal information, including names, account numbers, and balances, was acquired. Two New Hampshire residents were affected. The bank retained forensic experts, notified regulators, and offered credit monitoring.

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Incident timeline

discovery → filing · 9 weeks / 63 days

Sep 20, 2021

Begins

Sep 20, 2021

Discovered

Nov 22, 2021

Filed

vs. sector median

+1 wks slower

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Maine State AGbd_10f2b758a7ee743c2021-11-16 · +6dVerified
Massachusetts State AGbd_23c8f6c3a40358792021-11-16 · +6dVerified
Montana State AGbd_56f43a49c9b9e0ee2021-11-15 · +7dCandidate

Name: Horicon Bank
norm: horicon bank
Domain: gklaw.com

Name: Horicon Bank
norm: horicon bank
Industry: Financial Servicesllm

Discovered: Sep 20, 2021
Breach occurred: Sep 20, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 15, 2021
Affected individuals: 2state-resident count only
Data types: Identity (basic)Financial account
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified its financial regulators and federal law enforcement

During the incident: Retained forensic experts and outside counsel specializing in data security incidents
Notified its financial regulators and federal law enforcement
Deployed further end point protection software on our systems
Reviewed our security measures
Worked with consultants to restore the affected systems
Retained Kroll, Inc., to provide affected individuals with identity theft services
Engaged Experian to provide credit monitoring to impacted individuals
Changes made: Deployed further end point protection software on our systems
Reviewed our security measures
Worked with consultants to restore the affected systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(63 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Montana State AGNov 15 · first

Maine State AG+1d

Massachusetts State AG+1d

New Hampshire State AG+7d · this page

Pattern: first filing Nov 15 (MT), last Nov 22 (NH) — a 7-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/horicon-20211122.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 22, 2021
Raw hash: d797bfe9db23915f437627a84ea0bc6200b918f4582360d4a536bdf4decc0721

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityHoricon Bank

Victim entityHoricon Bank

Incidentdiscovered Sep 20, 2021

Stated responseRetained forensic experts and outside counsel specializing in data security incidents

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov