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Way to Stop Files from Automatically Downloading?
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<blockquote data-quote="Andy Ful" data-source="post: 979090" data-attributes="member: 32260"><p>The AVs can hardly recognize the HTML Smuggling because it is done inside the web browser.</p><p>If you use H_C with Recommended_Settings (or more restrictive) then the dropped file cannot be normally executed. The execution will be possible only if the user is fooled by the attacker to intentionally bypass the protection.</p><p></p><p>I remember only one case of HTML Smuggling, while searching the specific & rare security information via Google. After opening one of the websites (looked suspicious to me), it dropped an EXE file to disk. That website did not mention anything about this file and any download, so it might be compromised. Microsoft Defender was silent. I checked the file and it was signed by the EV certificate and previously unknown on Virus Total. After checking, all AVs on Virus Total considered it clean.</p><p><strong>Nothing indicated that the file could be malicious, except the HTML Smuggling.</strong><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite111" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /></p><p></p><p>Edit.</p><p>In many cases, the files dropped by HTML Smuggling will not be *.exe files but MS Office documents or other non-executable but weaponized files. These files can be a problem for AVs.</p></blockquote><p></p>
[QUOTE="Andy Ful, post: 979090, member: 32260"] The AVs can hardly recognize the HTML Smuggling because it is done inside the web browser. If you use H_C with Recommended_Settings (or more restrictive) then the dropped file cannot be normally executed. The execution will be possible only if the user is fooled by the attacker to intentionally bypass the protection. I remember only one case of HTML Smuggling, while searching the specific & rare security information via Google. After opening one of the websites (looked suspicious to me), it dropped an EXE file to disk. That website did not mention anything about this file and any download, so it might be compromised. Microsoft Defender was silent. I checked the file and it was signed by the EV certificate and previously unknown on Virus Total. After checking, all AVs on Virus Total considered it clean. [B]Nothing indicated that the file could be malicious, except the HTML Smuggling.[/B]:( Edit. In many cases, the files dropped by HTML Smuggling will not be *.exe files but MS Office documents or other non-executable but weaponized files. These files can be a problem for AVs. [/QUOTE]
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