Cybersecurity firm Cyfirma has recently published a detailed analysis of a new ransomware strain named Yurei, which has quickly gained attention due to its speed, stealth capabilities, and the irreversible damage it inflicts. Discovered in September 2025, Yurei is a sophisticated Go-based cyber threat designed to intimidate and disable its targets with advanced encryption and cunning operational tactics. Yurei’s encryption mechanism employs a combination of ChaCha20 and ECIES (Elliptic Curve I
