Regin is a sophisticated piece of malware that was discovered in 2014. It is designed for cyber espionage, allowing attackers to gather sensitive information from targeted systems. Regin is notable for its modular architecture, which means it can be customized with different components to perform various tasks, such as data collection and network surveillance. The malware primarily targets Windows operating systems and is believed to have been used in attacks against governments, telecommunications, and research institutions. Its stealthy nature and ability to remain undetected for long periods make it a significant threat in the realm of cyber security.