Exetools - Scylla x64/x86 Imports Reconstruction

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- - Scylla x64/x86 Imports Reconstruction (https://forum.exetools.com/showthread.php?t=13792)

deepzero, you can get them in t4u download area

Quote:

Originally Posted by ahmadmansoor (Post 86604)

just one thing pls upload the distorm 3.1 folder which u use .
I can't access it .
is there a problem to compile it with v10 instead of v9.0 of VS 2010
Thanks

Sorry, I don't want to include the distorm project. Just download the latest distorm from the official website and extract it in this folder.
I updated the project files: https://github.com/NtQuery/Scylla/commit/133a8fac409940012ee97d46d4955203bf4421bb

It should work with Visual Studio 2010. I compile it with platform toolset v90 to get WIN XP SP0/1 support. If you compile it with v10, you can execute it only on XP SP2+

@Newbie_Cracker
OK thx, I added it. See attachment.

ahmadmansoor had a nice idea for a new IAT search algorithm. It seems that it is very accurate after some tweaks, but takes a little bit longer depending on your computer.

Use the option "advanced iat search" and test it.

If you like to support this project, BTC Address: 1GmVrhWwUhwLohaCLP4SKV5kkz8rd16N8h

Code:

Version 0.9.2



- Pick DLL -> Set DLL Entrypoint

- Advanced IAT Search Algorithm (Enable/Disable it in Options), thanks to ahmadmansoor

- Fixed bug in Options

- Added donate information, please feel free to donate some BTC to support this project

new options added

Quote:

Version 0.9.4 beta

- direct import scan + fix: 5 byte CALL/JMP, junk byte must be after CALL/JMP
- create new iat in section
- fixed various bugs

Version 0.9.3
- new dll function: iat search
- new dll function: iat fix auto

Quote:

Version 0.9.4 Final

- direct import scanner (LEA, MOV, PUSH, CALL, JMP) + fixer with 2 fix methods
- create new iat in section
- fixed various bugs

I really recommend to update due to the bug fixes.

Direct import scanner fix methods:
- Normal: Patch memory with jmp/call only
- Universal: Works with everything, creates a jump table in the scylla section, watch for relocation information in the log file

I also found some weird thing in Windows 7 x64. I don't know yet why this happens:

Quote:

### Windows 7 x64

Sometimes the API kernel32.dll GetProcAddress cannot be resolved, because the IAT has an entry from apphelp.dll
Solution? I don't know

The 0.9.4 betra behaved strange on my latest attempts.
On simple unpackmes the resulted dump was invalid....
I home that 0.9.4 final does not have that behaviour.

Quote:

Originally Posted by Carbon (Post 89759)

I was watch ur update ,My friend Universal import scanner fix is a Good Idea .
but it is limited with some Protector ,in other it is Difficult to handle it .
Let take the Themida/Winlicense : through the unpacked rutine ,it pass through IAT Table rebuild which write the API to the file .here it decide to write the

Quote:

NOP
Jmp xxxxx
or
Call xxxxx
Nop

so this nop it Defined through this rutine ,and I think it is random .

Quote:

00412893 CC int3
00412894 > 90 nop
00412895 .- E9 96287477 jmp msvcr100.__set_app_type
0041289A > 90 nop
0041289B .- E9 60587477 jmp msvcr100._amsg_exit
004128A0 > 90 nop
004128A1 .- E9 3A647477 jmp msvcr100.__wgetmainargs
004128A6 CC int3
+++++++++++++++++++++++++++++++++++++
004129C7 CC int3
004129C8 > 90 nop
004129C9 .- E9 D2567477 jmp msvcr100._exit
004129CE > 90 nop
004129CF .- E9 BCA68177 jmp msvcr100._XcptFilter
004129D4 >- E9 E7567477 jmp msvcr100._cexit
004129D9 . 6F outs dx, dword ptr es:[edi]
004129DA >- E9 A1567477 jmp msvcr100.exit
004129DF 13 db 13
004129E0 > 90 nop
004129E1 .- E9 DA708177 jmp msvcr100._CrtSetCheckCount
004129E6 CC int3

so guessing which NOP is the right to replce for Fix This import will fault by 70%

pls check this Image :
http://postimg.org/image/6fzu4kr8v/
and u will see what I was talking about .I have write a lot of tut on rebuild IAT for Themedi I can send it to u and through this tut u will see when and where the nop is written .
and so on for other Protector ,which each one his privacy .

Quote:

I also found some weird thing in Windows 7 x64. I don't know yet why this happens

can u give example (code or File ) ?

Thanks for ur great work ,pls keep up.

@giv
feel free to report bugs.

@ahmadmansoor
Try the "universal" direct import fixer (enable in options). It will work with Themida and any other protector.

I don't think I can give an example. It is still weird. It has probably something to do with this https://forum.tuts4you.com/topic/34548-scylla-version-announcements/#entry159332

Quote:

Originally Posted by Carbon (Post 89799)

@ahmadmansoor
Try the "universal" direct import fixer (enable in options). It will work with Themida and any other protector.

my friend the example which I gave u in the Picture was universal enable in options :D I will upload the files when back to home .

Quote:

I don't think I can give an example. It is still weird. It has probably something to do with this https://forum.tuts4you.com/topic/34548-scylla-version-announcements/#entry159332

I will check this

Quote:

Originally Posted by ahmadmansoor (Post 89800)

my friend the example which I gave u in the Picture was universal enable in options :D I will upload the files when back to home .

Now I see there is a bug. You must disable the "normal" fixer otherwise the "universal" will not work. And it is fixed only in the dumped and fixed file. Not in memory.

Lol .... my friend I have disable the "normal" fixer too.
I have use the default option when run Scylla first time .
check picture
http://postimg.org/image/umncnodiv/

Quote:

Originally Posted by ahmadmansoor (Post 89806)

Lol .... my friend I have disable the "normal" fixer too.
I have use the default option when run Scylla first time .
check picture
http://postimg.org/image/umncnodiv/

yes that are the correct settings. Now dump and fix and the direct imports will be resolved.

I think I miss something ,so u keep the same size of (jmp or Call) and not make any changes

Quote:

E9 xxxxxx >>>> E9 API
not fixing it to
E9 xxxxxx >>>> FF25 xxxxxx

Ok let me do more checks .

I change the jmp destination to a jmp table.

1.Scylla should have option to use PE Header of module on disk just like imprec .
right now, scylla read the pe header from memory and in some case the export directory is destroy make scylla crash.
You could try some target using cryengine sdk such as Warface to get this case/.

2. About apphelp.dll, we could resolve it using plugin to handle it.