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Video Reviews - Security and Privacy
Those Nasty RATS Part 4
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<blockquote data-quote="509322" data-source="post: 578721"><p>The product works as designed.</p><p></p><p>CS' whole point in the video is that digital certificates can be used to bypass security software. This is true of any software that will allow a file to execute if it has a valid certificate.</p><p></p><p>The fact is that digital certificates - as a trust mechanism in and of themselves - have inherent risks.</p><p></p><p>* * * * *</p><p></p><p>If a file is signed using a valid certificate from a publisher on the Trusted Publisher List, then that file will be permitted to execute in Protected mode. Protected mode is designed this way to permit updates that are signed all the way through the run sequence from User Space. Protected mode was implemented as a balance between usability while still providing high security with only a small potential for malicious code to execute.</p><p></p><p>If a file is faked-signed it will be blocked in Protected mode.</p><p></p><p>If a file has a valid certificate, but the publisher is not on the Trusted Publisher List, then the file can execute but it is Guarded. Guarded will prevent creation of an autorun. Technically, if it is allowed to run it can potentially result in a user session infection. However, once the system is rebooted it will not execute and just be dormant on the system - unless the user manually re-executes it.</p><p></p><p>In short, in Protected mode AppGuard is working as intended.</p><p></p><p>While it is possible that a valid certificate can be stolen and re-purposed for malicious means, the risk is low.</p><p></p><p>For those that are paranoid about such things, AppGuard has Locked Down mode.</p><p></p><p>The dll block alert occurs as a result of the way rundll32 searches for dlls in the file system. It could have been regsvr32 as well.</p></blockquote><p></p>
[QUOTE="509322, post: 578721"] The product works as designed. CS' whole point in the video is that digital certificates can be used to bypass security software. This is true of any software that will allow a file to execute if it has a valid certificate. The fact is that digital certificates - as a trust mechanism in and of themselves - have inherent risks. * * * * * If a file is signed using a valid certificate from a publisher on the Trusted Publisher List, then that file will be permitted to execute in Protected mode. Protected mode is designed this way to permit updates that are signed all the way through the run sequence from User Space. Protected mode was implemented as a balance between usability while still providing high security with only a small potential for malicious code to execute. If a file is faked-signed it will be blocked in Protected mode. If a file has a valid certificate, but the publisher is not on the Trusted Publisher List, then the file can execute but it is Guarded. Guarded will prevent creation of an autorun. Technically, if it is allowed to run it can potentially result in a user session infection. However, once the system is rebooted it will not execute and just be dormant on the system - unless the user manually re-executes it. In short, in Protected mode AppGuard is working as intended. While it is possible that a valid certificate can be stolen and re-purposed for malicious means, the risk is low. For those that are paranoid about such things, AppGuard has Locked Down mode. The dll block alert occurs as a result of the way rundll32 searches for dlls in the file system. It could have been regsvr32 as well. [/QUOTE]
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