return addresses

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asmrox

Joined: 19 Jan 2008
Posts: 160

asmrox 07 May 2008, 14:08

im writing an universal shellcode and i need all return addresses in all version of windows.
2k/2k3/millenium/xp/vista including all SP's

thanks.

07 May 2008, 14:08

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20422
Location: In your JS exploiting you and your system

revolution 07 May 2008, 14:21

What about the monthly patches also? What about future updates/upgrades? Return address for what? Each and every DLL in Windows? Including all different optional components and other whatnot?

Forget it, this is a crazy idea.

07 May 2008, 14:21

asmrox

Joined: 19 Jan 2008
Posts: 160

asmrox 07 May 2008, 15:19

umm return addreses from normal .exe/.dll files.
You know, to ExitThread. I have an idea to scan stack for one of them, and obtain version of windows (so i have addreses of kernel32 api's like LoadLibraryA)

Quote:

Forget it, this is a crazy idea.

why?

07 May 2008, 15:19

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20422
Location: In your JS exploiting you and your system

revolution 07 May 2008, 15:27

You can get all the addresses you need by simply linking to the DLL and call GetProcAddress at runtime.

To ask everyone to give you return address is not needed and is very silly. The addresses change because the DLL's are relocatable.

07 May 2008, 15:27

asmrox

Joined: 19 Jan 2008
Posts: 160

asmrox 07 May 2008, 17:13

Quote:

DLL's are relocatable

can you tell me which function relocate dll?
AFAIK kernel32 cant be relocated abyway ;] Returning by 'ret' would have no sense. And LoadLibraryA/GetProcAddress are from kernel32, but not in same place on all systems. And in shellcode i cant link dll, lol.
http://www.google.com/search?q=what+is+shellcode

07 May 2008, 17:13

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20422
Location: In your JS exploiting you and your system

revolution 07 May 2008, 17:22

asmrox wrote:

can you tell me which function relocate dll?

The loader (LoadLibrary) will relocate the DLL, but it is easy to do with a small utility anyway. I know a few easy ways to find kernel32 but I can't be bothered to explain them right now.

Haha, don't forget about ASLR. Your task is not easy and I doubt many here will support this effort anyway.

07 May 2008, 17:22

asmrox

Joined: 19 Jan 2008
Posts: 160

asmrox 07 May 2008, 17:25

aslr under windows?

Quote:

The loader (LoadLibrary) will relocate the DLL

i though it just maps into memory space, and if its already mapped it return handle.

07 May 2008, 17:25

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20422
Location: In your JS exploiting you and your system

revolution 07 May 2008, 17:30

asmrox wrote:

aslr under windows?

Vista has it.

asmrox wrote:

Quote:
The loader (LoadLibrary) will relocate the DLL

i though it just maps into memory space, and if its already mapped it return handle.

Yep, it maps it in and if it won't fit it will then relocate. The OS uses copy-on-write to accomplish this.

07 May 2008, 17:30

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