Ryuk ransomware is a type of malicious software that encrypts files on a victim’s computer, making them inaccessible until a ransom is paid. It first emerged in 2018 and is often used in targeted attacks against organizations.Once the ransomware infiltrates a system, it quickly spreads across the network and locks critical files. The attackers then demand payment, typically in Bitcoin, to provide a decryption key that allows victims to regain access to their data.Ryuk is known for its sophistication and high ransom demands, frequently ranging from tens of thousands to millions of dollars. Its creators often research their targets, identifying valuable data to maximize the likelihood that victims will pay.Due to its targeted nature and association with advanced cybercrime groups, Ryuk remains a significant concern for businesses and institutions. Defending against it typically involves robust cybersecurity practices and regular data backups to mitigate the impact of a potential infection.