ransomware ryuk

What is Ransomware Ryuk? How to prevent it?
cybercriminals are using a new form of ransomware to target large businesses and take money from it. since august, the ryuk team has made $ 4 million by installing malicious encryption software on high-value targets.
Strange ransomware detection only attacks the rich
other ransomware often spread to all victims if possible, but the new ransomware is different, it selectively infects.