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Possible to abuse the sections in which are excluded from signature check in a signed executable?
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<blockquote data-quote="Andy Ful" data-source="post: 1039753" data-attributes="member: 32260"><p>It would be possible (I think) to find benign executables that use URLs embedded into the certificate structure (without breaking it) to download/execute benign applications. The most probable candidate would be an online installer. In this way, one can sign one executable and modify the URL to obtain many online installers (no need to sign them again).</p><p>By abusing the URL, the attacker could make the benign online installer into a signed trojan downloader.</p><p>Anyway, I did not see such an attack technique in the wild (for a couple of years). </p><p>Here is some info from the year 2013:</p><p></p><p></p><p>[URL unfurl="true"]http://blogs.technet.com/b/srd/archive/2013/12/10/ms13-098-update-to-enhance-the-security-of-authenticode.aspx[/URL]</p></blockquote><p></p>
[QUOTE="Andy Ful, post: 1039753, member: 32260"] It would be possible (I think) to find benign executables that use URLs embedded into the certificate structure (without breaking it) to download/execute benign applications. The most probable candidate would be an online installer. In this way, one can sign one executable and modify the URL to obtain many online installers (no need to sign them again). By abusing the URL, the attacker could make the benign online installer into a signed trojan downloader. Anyway, I did not see such an attack technique in the wild (for a couple of years). Here is some info from the year 2013: [URL unfurl="true"]http://blogs.technet.com/b/srd/archive/2013/12/10/ms13-098-update-to-enhance-the-security-of-authenticode.aspx[/URL] [/QUOTE]
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