SonicWall cloud backup hack leading to Marquis ransomware attack
Date of Incident: August 2025 Overview: In August 2025, a breach involving SonicWall’s cloud backup led to a ransomware attack on Marquis Software Systems, significantly impacting numerous US banks and credit unions. The attack exploited vulnerabilities in SonicWall’s firewall management system. Threat actors gained unauthorized access, stole firewall configuration files, and used them for lateral… Read More »SonicWall cloud backup hack leading to Marquis ransomware attack



