The Gentlemen Ransomware is a ransomware-as-a-service (RaaS). The Gentlemen Ransomware has been written in Go programming language and has utilized Garble to obfuscate its code to target Windows environments. The Gentlemen Ransomware is capable of executing its’ OS lockers in Windows, Linux, NAS, BSD and ESXi environments. The Gentlemen Ransomware was first observed in mid-2025 as a closed ransomware and shortly later emerged as a RaaS to affiliates in September 2025. The Gentlemen Ransomware has been affiliated with the threat group The Gentlemen.