More Banks Issue Breach Notifications Over Supplier Breach

Ransomware Attackers Grabbed Customer Data Stored by Marquis Software Solutions Mathew J. Schwartz (euroinfosec) • December 31, 2025

More financial services firms are reporting breaches of customer data that trace to a ransomware attack against Marquis Software Solutions.

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The Texas company develops marketing and compliance software and counts more than 700 banks and credit unions as customers.

They include Artisans' Bank, based in Wilmington, Delaware, and VeraBank, based in Henderson, Texas, which last week each notified tens of thousands of customers that their personal data was stolen.

The culprit: a hack attack and data breach on Aug. 14 involving a ransomware group breaching Marquis' SonicWall firewall (see: Marketing and Compliance Software Vendor to Banks Breached).

Third-party digital forensic investigators hired to probe the incident found the attacker may have accessed files containing data stored by Marquis Software on ...