Marquis Software Solutions is notifying banks and credit unions of a ransomware attack that leaked their customer data. The Texas-based digital and physical marketing firm learned of the ransomware cyber-attack on 14 August 2025, after detecting suspicious activity on its network. It responded by launching an investigation and notifying law enforcement. The probe determined that the threat actor breached its SonicWall firewall to gain initial access.[1]
After gaining access, the attackers exf
