anti debugger

[xtremex]

Can anybody trace and tell me what kindda protection uses this program against debugger?

VirtualLav v5.0.4
http://www.binarybiz.com/vlab/index.php
> http://www.binarybiz.com/vlab/downloads/virtuallab.zip

[CoDe_InSiDe]

I've downloaded and checked the program, and i haven't found any Anti-Debugger stuff... :huh:

[xtremex]

Now try to trace it please.
IDA works in exe (vlabpro.exe) but It can't trace the module (VHDDRecovery.dll). I just hogs.
Olly just breaks in the same point, but not where the our bp is located.
SoftSnoop (more an API tracer) remains in a loop.

[CoDe_InSiDe]

I've traced it, and there's no problem tracing it with SoftICE.
W32Dasm just quits and that's probably because the file (And certain other things like the Resource Section) is too big (But I don't know if this also counts for IDA, I don't have IDA so I can't check it).
But I still don't see any Anti-Debugger stuff, only Anti-Disassembler stuff...

I'm not too familiar with OllyDbg (I've got it here but I actually never use it :) ).
I think someone else needs to look at this program :D

[xtremex]

SoftIce is more likely to work than others. I'm to lazy to install it.
But still Ollydbg doesn't work, nor IDA.
The code in module VHDDRecovery is important to be traced.
I havent seen any anti-debuger code myself (don't have much knowledge though) when decompiling Exe with Dede v350.
And it's curios why Dede can't decompile the module.
I guess it has something to do with the Shared Memory Manager Replacer that it uses.