As Endpoint Detection and Response (EDR) solutions improve malware detection efficacy on Windows and Linux systems, certain state-sponsored threat actors have shifted to developing and deploying malware on systems that do not generally support EDR such as network appliances, SAN arrays, and VMware ESXi hosts.
In late 2022, Mandiant published details surrounding a novel malware system deployed by UNC3886, a Chinese cyber espionage group, which impacted VMware ESXi hosts, vCenter servers, and Windows virtual machines (VM).
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Source: Mandiant