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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">02/07/2022 - Diary entry #447<br>
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In the past weeks, a new zero-day vulnerability in Zimbra was disclosed. Zimbra is an open-source e-mail platform used by several companies and even European governments. The vulnerability allows an attacker to exfiltrate data from the webclient, only requiring
that the user access a malicious link while logged into Zimbra through a web browser.
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<div>The Chinese threat actor, tracked as TEMP_Heretic, is actively exploiting this vulnerability in the wild. TEMP_Heretic attacks consisted of two phases. In the first, a generic spam e-mail was sent as reconnaissance, just to track which users received and
opened the messages. The second phase contained a spear-phishing message, luring the users to open a malicious link to a phishing page with the exploit.</div>
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<span>This incident is an example of why security awareness training is necessary. Even just accessing links from unknown senders poses a risk and should be avoided at all costs. When in doubt, for instance, if an employee receives an e-mail claiming to be
from the directory or manager that it normally does not have contact with, they should use a secondary secure channel to validate with the supposed e-mail author before opening any links or attachments.</span><span style="margin:0px"></span><span style="margin:0px"></span>
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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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