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General Security Discussions
Hiding malware in Windows – The basics of code injection
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<blockquote data-quote="Eddie Morra" data-source="post: 770161"><p>In fact, I recommend all AV vendors to do the following.</p><p></p><p>1. Use ObRegisterCallbacks to monitor for process handle/duplication attempts on sensitive processes like explorer.exe.</p><p>2. Remove the access rights for flags like PROCESS_VM_OPERATION. Only grant access for things like query information.</p><p>3. Now it makes everything tougher because it is going to be a pain trying to RCE into the process without sufficient rights to do things like virtual memory operations, thread creation, etc.</p><p></p><p>Same applies to the process's threads to block the ability for hijacking it via APC and what-not.</p></blockquote><p></p>
[QUOTE="Eddie Morra, post: 770161"] In fact, I recommend all AV vendors to do the following. 1. Use ObRegisterCallbacks to monitor for process handle/duplication attempts on sensitive processes like explorer.exe. 2. Remove the access rights for flags like PROCESS_VM_OPERATION. Only grant access for things like query information. 3. Now it makes everything tougher because it is going to be a pain trying to RCE into the process without sufficient rights to do things like virtual memory operations, thread creation, etc. Same applies to the process's threads to block the ability for hijacking it via APC and what-not. [/QUOTE]
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