Yurei ransomware is a newly identified threat that exploits SMB shares to propagate across networks, significantly increasing its lateral movement capabilities. This ransomware variant targets Windows environments by leveraging Server Message Block (SMB) protocol vulnerabilities and misconfigurations to access shared folders and spread rapidly within corporate networks. Once inside, Yurei encrypts critical files and demands ransom payments, disrupting business operations and causing financial losses. The attack chain typically begins with phishing emails or compromised credentials, followed by exploitation of SMB shares to move laterally and escalate privileges. Organizations are urged to strengthen SMB security by disabling SMBv1, enforcing strong access controls, and monitoring network traffic for unusual SMB activity. Additionally, regular backups and endpoint protection solutions are critical to mitigate the impact of Yurei ransomware attacks. This article delves into the technical details of Yurei's propagation methods, indicators of compromise, and recommended defensive measures to protect against this emerging ransomware threat.
This Cyber News was published on cybersecuritynews.com. Publication date: Wed, 08 Oct 2025 12:35:39 +0000