Black Arrow Cyber Advisory – LockBit Ransomware Now Actively Targeting VMware ESXi Hosts

Black Arrow Cyber Advisory – LockBit Ransomware Now Actively Targeting VMware ESXi Hosts

Executive Summary

LockBit, a ransomware gang that first came to prominence in 2021, has made improvements to its Ransomware-as-a-Service (RaaS), advertising that it will now actively target VMware ESXi virtual machines. VMware ESXi is a highly popular virtualisation platform and is found in most business environments globally and allows for the consolidation of software servers and services onto a single physical machine, saving both space and costs. The new LockBit features include the ability to find all running Virtual Machines (VMs) and manipulate their power states to ensure they are encrypted successfully.

What’s the risk to me or my business?

Due to the popularity of ESXi, there is an increased risk to those running the platform. The changes demonstrate that RaaS operators are keenly aware that businesses present lucrative targets, actively implementing features that have the greatest potential for harm in an enterprise environment.

What can I do?

Ensure that your systems and services across your network remain up-to-date and current. Attackers will often use a combination of bugs, vulnerabilities and misconfigurations to breach an environment before going on to exploit other devices. For ESXi specifically, consider disabling Secure Shell (SSH) if enabled, and ensure the use of TLS (HTTPS) on any exposed web interfaces.

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