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<div style="margin:0px;font-size:14.67px;background-color:white !important">I hope everyone is doing well!</div>
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<div style="margin:0px;font-size:14.67px;background-color:white !important">Below is the entry for today.</div>
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<div style="margin:0px;font-size:14.67px;background-color:white !important">13/01/2021 - Diary entry #429<br>
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In our Daily Diaries #418 and #422 we covered AvosLocker, a Windows ransomware that operates in the Ransomware-as-a-Service business model. This month a new version of AvosLocker was disclosed, increasing the support for more operating systems.
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<div>The new version of AvosLocker implemented the support for Linux, adding a new ELF binary in its toolkit, dubbed AvosLinux. This payload was created specifically to target vulnerable VMWare ESXi servers during the lateral movement phase (after the initial
breach).</div>
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<div>We covered this tendency of targeting virtual machine hypervisors in several of last year's Daily Diaries. More recently in our Daily Diary #373, where we covered BlackMatter ransomware. With capabilities to attack this kind of service, the ransomware
operations highly increase their attack surface and damage. If the malware reaches the hypervisor machine, it's trivial to compromise all the hosted machines.</div>
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We highly recommend for companies using Virtual Machine Hypervisors to adopt a ZeroTrust mindset and segment these services into a separated network. As ransomware families evolve, it's becoming more and more common for them to target this kind of service.
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<span style="margin:0px;font-size:14.67px;background-color:white !important">Kind Regards,</span></div>
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<strong>Felipe Duarte Domingues</strong><br>
Security Researcher<br>
<strong>Appgate</strong></p>
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