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About DBVM

 
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unrealord
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PostPosted: Tue Jul 01, 2008 9:39 pm    Post subject: About DBVM Reply with quote

Is this DBVM command working?

2: total memory cloak toggle
This will enable or disable memory cloaking for ALL processes (slow, but safe)
note that memorycloak will be only get activated after a CR3 change (taskswitch)

If it is working, what is the correct way to use it?
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Dark Byte
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PostPosted: Tue Jul 01, 2008 10:39 pm    Post subject: Reply with quote

By default, programs can edit the page table, and read the physical memory of where DBVM is located. With this option, it emulates all paging, and this also all manual edits to get to the physical memory, and filters out the physical memory used by dbvm with random memory

I havn't tried it in a while, but it currently only works when your system doesn't use PAE paging (so only normal 4 MB paging)

Also, if you planned on using it to hide a process's memory, or that of a driver, I recommend going for the CR3 callback routine and editing the pagetable on a swith to your process from an unknown process. (is a bitch in xp, but vista has a better way of switching tasks)

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unrealord
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PostPosted: Tue Jul 01, 2008 11:49 pm    Post subject: Reply with quote

thanks dark byte Very Happy, just one question, when i set Cr3 callback do i need to do it from each processor?, or is enough registering it from any of them, btw, it would be great if interrupt 0x0E would be redirected just like interrupt 1
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Dark Byte
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PostPosted: Wed Jul 02, 2008 6:42 am    Post subject: Reply with quote

yes, thats why the note telling it's cpu specific. so do it for all cpu's (basically as easy as setting the correct affinity and calling the vmcall)

I'll see if I can add a routine to redirect any int

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