Marquis: Ransomware gang stole data of 672K people in cyberattack
Summary
Marquis, a Texas-based financial services provider, disclosed that a ransomware attack in August 2025 resulted in the theft of data belonging to over 670,000 individuals. The attack also significantly disrupted operations for 74 banks across the United States.
IFF Assessment
FOE
This is bad news for defenders as it signifies a successful ransomware attack that led to a large-scale data breach and operational disruption.
Defender Context
This incident highlights the ongoing threat of ransomware targeting critical financial infrastructure and the severe impact of data exfiltration on individuals. Defenders must prioritize robust endpoint protection, network segmentation, and rapid incident response capabilities to mitigate such attacks.