Ransomware groups are increasingly targeting VMware ESXi hypervisors, a popular virtualization and management system, because they lack third-party agents or antivirus software, and there is a lack of network segmentation and publicly known vulnerabilities. This technique, known as hypervisor jackpotting, has been adopted by multiple ransomware groups, such as Royal, Conti, REvil, and others. Organizations are advised to avoid direct access to ESXi hosts, enable two-factor authentication, take backups, and review their security posture in order to reduce the risk.
Source: Hackernews
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