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Medium

First Northern Bank of Dixon Customer Data Exposed via Marquis Software Breach

Customer data from First Northern Bank of Dixon was among the information exposed in the ransomware attack on Marquis Software Solutions on August 14, 2025.

Key points

  • Impacted by the Marquis Software Solutions ransomware attack on August 14, 2025.
  • Personal and financial data of First Northern Bank of Dixon customers exposed through the third-party vendor.
  • Data included names, addresses, phone numbers, SSNs, TINs, financial account info, and dates of birth.

Connected intelligence

Signal brief

Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.

02

Likely method

Ransomware

Malware activity

03

Potential impact

Data Exposure

Confidentiality, Availability

Published
Aug 14, 2025
Updated
Jun 26, 2026
Confidence
Medium
Evidence
2 sources

Structured assessment

Signal analysis

This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.

Threat source

Malware activity

Watch ransomware, endpoint compromise and business interruption exposure.

  • Source type: supplier or third-party involvement

Business impact

Potential operational disruption
Impact area
Confidentiality, Availability
Likely asset
User or customer data

Mentioned entities

ThatsmybankData DisclosureFirst Northern Bank of DixonMarquis Software SolutionsMarquisTaxpayer Identification NumbersImpactedPersonal andSSNsTINs

Quick context

Questions about this signal

What happened in this signal?

Customer data from First Northern Bank of Dixon was among the information exposed in the ransomware attack on Marquis Software Solutions on August 14, 2025. The breach of Marquis, a third-party vendor, led to the theft of personal and financial information, including names, addresses, phone numbers, Social Security numbers, Taxpayer Identification Numbers, financial account information, and dates of birth. First Northern Bank of Dixon customers were impacted as Marquis handled their data for marketing and compliance services.

When was this signal reported?

Shadow Tier lists Aug 14, 2025 as the signal date.

Which organization is connected to this signal?

Thatsmybank is the organization connected to this public signal.

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Which attack pattern is relevant?

This signal is connected to current ransomware incidents based on its reported incident context.

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Which impact area is relevant?

This signal is connected to data exposure and breach intelligence based on its reported consequences.

Explore data exposure and breach intelligence