<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="margin:0px;font-size:12pt;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;background-color:white"><span style="margin:0px;font-size:14.67px">Hello,</span></span></span></span></span><span style="margin:0px;background-color:white"></span><span style="background-color:rgb(255, 255, 255);display:inline !important"></span>
<div style="margin:0px;font-size:12pt;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;font-size:15px;color:rgb(32, 31, 30);background-color:white">
<div style="margin:0px;font-size:12pt;color:black">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;font-size:15px;color:rgb(32, 31, 30);background-color:white">
<div style="margin:0px;font-size:12pt;color:black">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;font-size:15px;color:rgb(32, 31, 30);background-color:white">
<div style="margin:0px;font-size:12pt;color:black">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;font-size:15px;color:rgb(32, 31, 30);background-color:white">
<div style="margin:0px;font-size:12pt;color:black">
<div style="margin:0px;background-color:white">
<div style="margin:0px;font-size:15px;color:rgb(32, 31, 30);background-color:white">
<div style="margin:0px;font-size:12pt;color:black">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;background-color:white">
<div style="margin:0px;font-size:15px;color:rgb(32, 31, 30);background-color:white">
<div style="margin:0px;font-size:12pt;color:black"><span style="margin:0px;background-color:white"></span>
<div style="margin:0px;background-color:white">
<div style="margin:0px;font-size:14.67px;background-color:white">I hope everyone is doing well!</div>
<div style="margin:0px;font-size:14.67px;background-color:white"><br>
</div>
<div style="margin:0px;font-size:14.67px;background-color:white">Below is the entry for today.</div>
<div style="margin:0px;font-size:14.67px;background-color:white"><br>
</div>
<div style="margin:0px;font-size:14.67px;background-color:white">07/15/2021 - Diary entry #305<br>
<br>
</div>
<blockquote style="font-size:14.67px;background-color:white;margin-top:0px;margin-bottom:0px">
<div style="margin:0px"></div>
<div style="margin:0px"></div>
First discovered in 2020, HelloKitty ransomware is a human-driven ransomware, mainly found on targeted attacks. The threat actors behind it adopt the double-extortion model, stealing data before encrypting it and threatening to publish if the ransom is not
payed. For the encryption process HelloKitty ransomware can use either the famous combination of AES-256 + RSA-2048 or AES-128 + NTRU (a post-quantum cryptography algorithm). Initially, this threat was Windows only, but recent versions have been found using
Golang compiled binaries to attack Linux machines as well (a trend covered in our Daily Diary #186).
<div><br>
</div>
<div>HelloKitty Ransomware became very famous after the CD Projekt Red attack, covered in our Daily Diary #204. In this incident they managed to steal the source code of several games. This week a new variant of HelloKitty Ransomware has been found targeting
ESXi servers. The new payload embed functions to stop VMware server virtual machines, and focus on encrypting VMware virtual hard disks and other files associated with virtual machines and snapshots.</div>
<div><br>
</div>
In our Daily Diary #294 we covered a Sodinokibi variant also targeting ESXi servers. This capability highly increases the damage on network architectures built around Virtual Machines, as if the ESX server is compromised, many others are damaged as well. We
recommend system administrators running ESX servers to redouble their security measures, preferably adopting a zero trust methodology and segmenting the ESX server network from the others.
<div style="margin:0px"><br>
</div>
</blockquote>
<span style="margin:0px;font-size:14.67px;background-color:white">Kind Regards,</span></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div id="Signature">
<div>
<div></div>
<div></div>
<div></div>
<div></div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<table style="font-family:"Times New Roman"; font-size:medium; text-align:start">
<tbody>
<tr>
<td width="180" align="left" style="width:180px">
<table align="left" style="box-sizing: border-box; width: 126px; height: 88px;">
<tbody>
<tr>
<td colspan="3" align="center" style="box-sizing: border-box; width: 122px; height: 36px;">
<a href="https://www.appgate.com/"><img alt="" width="120" height="30" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/logo@2x.png"></a></td>
</tr>
<tr>
<td colspan="3" align="center" style="box-sizing: border-box; width: 122px; height: 20px;">
</td>
</tr>
<tr>
<td align="center" style="box-sizing: border-box; width: 43.6562px; height: 24px;">
<a href="https://www.linkedin.com/company/appgate-security/"><img width="18" height="18" alt="" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/likedin@2x.png"></a></td>
<td style="box-sizing: border-box; width: 33.0312px; height: 24px;"><a href="https://twitter.com/AppgateSecurity"><img width="20" height="18" alt="" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/twitter@2x.png"></a></td>
<td style="box-sizing: border-box; width: 41.3125px; height: 24px;"><a href="https://www.youtube.com/channel/UC-8GvxcZbm-R3EJNl8jYjiQ"><img width="26" height="18" alt="" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/youtube@2x.png"></a></td>
</tr>
</tbody>
</table>
<p> </p>
</td>
<td width="350" colspan="2" rowspan="2" style="width:350px">
<p style="font-family:Arial,Helvetica,sans-serif; font-size:13px; color:rgb(12,12,12)">
<strong>Felipe Duarte Domingues</strong><br>
Security Researcher<br>
<strong>Appgate</strong></p>
<p style="font-family:Arial,Helvetica,sans-serif; font-size:13px; color:rgb(12,12,12)">
E:<span> </span><font color="#228ebe"><a href="mailto:felipe.duarte@appgate.com" title="mailto:felipe.duarte@appgate.com">felipe.duarte@appgate.com</a></font><br>
O: <span style="background-color:rgb(255,255,255); display:inline!important">+55 19 98840 2509</span></p>
</td>
</tr>
</tbody>
</table>
<br>
</div>
</div>
</div>
</div>
</body>
</html>