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Hello,</div>
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<div>I hope everyone is doing well!</div>
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<div>Below is the entry for today.</div>
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<div>12/16/2021 - Diary entry #413:</div>
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<div>A new Ransomware family targeting Windows OS emerged after the Log4J vulnerability disclosure. Named Khonsari, it's a .NET payload that has 12KB and contains only the most basic functionality required to encrypt files. Khonsari uses the algorithm AES 128
CBC and renames each file with the extension ".khonsari".
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<div>As soon as it's executed, Khonsari will list all available drives and encrypt them entirely, except the C:\ drive. On the C:\ drive, it will encrypt only the following folders: Documents, Videos, Pictures, Downloads, and Desktop. Then, it drops a ransom
note demanding a Bitcoin payment to recover the compromised data.</div>
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The distribution of Khonsari was limited, and the server that originally delivered the Ransomware - after exploiting the Log4J vulnerability - is now serving a generic Backdoor. The simplicity of this new threat suggests that the threat actors are experimenting
with this new attack vector and Khonsari may evolve from now on.<br>
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Kind Regards,<br>
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<td colspan="3" align="center"><a href="https://www.appgate.com/" target="_blank" rel="noopener noreferrer" style="margin:0px"><img style="margin:0px" width="120" height="30" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/logo@2x.png"></a></td>
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<td width="37%" align="center"><a href="https://www.linkedin.com/company/appgate-security/" target="_blank" rel="noopener noreferrer" style="margin:0px"><img style="margin:0px" width="18" height="18" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/likedin@2x.png"></a></td>
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<td width="35%"><a href="https://www.youtube.com/channel/UC-8GvxcZbm-R3EJNl8jYjiQ" target="_blank" rel="noopener noreferrer" style="margin:0px"><img style="margin:0px" width="26" height="18" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/youtube@2x.png"></a></td>
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<p style="color:rgb(12,12,12); font-size:13px; font-family:Arial,Helvetica,sans-serif; margin-top:0px; margin-bottom:0px">
<strong>Felipe Tarijon de Almeida</strong><br>
Malware Analyst<br>
<strong>Appgate</strong></p>
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E:<span style="margin:0px"> <a href="mailto:felipe.tarijon@appgate.com" title="mailto:felipe.tarijon@appgate.com">
felipe.tarijon@appgate.com</a></span><br>
O:<span> </span><span style="margin:0px; background-color:white">+55 11 97467 9549</span></p>
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