VMware ESXi devices, integral to running multiple virtual machines on a single server, are frequently neglected, making them prime targets for cybercriminals. According to Sygnia, many attacks stem from exploiting existing vulnerabilities or stolen admin credentials. The SSH service, used for remote management, poses significant risks as attackers can leverage it to establish persistent backdoors. Compounding the issue, ESXi's logging system is fragmented, complicating monitoring efforts. To safeguard these systems, administrators should actively inspect SSH activity, monitor for signs of lateral movement, and ensure robust security practices are upheld across the network.
Check the SSH logs for unusual logins or commands, especially from unknown IP addresses.
Monitor the ESXi system for any signs of lateral movement within the network, which could indicate a potential breach.
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