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[help]My first time DLL Injection
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ShurikeN
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PostPosted: Fri Jun 06, 2008 5:53 am    Post subject: [help]My first time DLL Injection Reply with quote
i tried to inject this test dll into minesweeper, i used winjector and it says successfully injected but the messagebox doesn't show up. Am i missing something here?
Code:

#include <windows.h>

BOOL APIENTRY DllMain ( HINSTANCE hInst, DWORD dwReason, LPVOID reserved )
{
      if( dwReason == DLL_PROCESS_ATTACH )
            MessageBox( 0, "Attached!", 0, 0 );
     return TRUE;
}

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DeletedUser14087
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PostPosted: Fri Jun 06, 2008 6:49 am    Post subject: Reply with quote
Use CreateThread.
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ShurikeN
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PostPosted: Fri Jun 06, 2008 7:28 am    Post subject: Reply with quote
didn't work too. I thought it was my compiler (CodeBlocks) but when i tried it on my OLD Dev-C++ it gives the same result.
Code:

#include <windows.h>

DWORD ThreadID;
DWORD WINAPI NewThread( LPVOID lParam ) {
      MessageBox( 0, "Attached!", 0, 0 );
      ExitThread( 0 );
}

BOOL APIENTRY DllMain( HINSTANCE hInst, DWORD dwReason, LPVOID lpReserved ) {
     if( dwReason == DLL_PROCESS_ATTACH ) {
          CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)&NewThread, 0, 0, &ThreadID );
     }
     return 1;
}

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tombana
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PostPosted: Fri Jun 06, 2008 9:18 am    Post subject: Reply with quote
It's not necessary to use CreateThread. It should work fine. Try removing if(dwReason....) part.
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Bizarro
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PostPosted: Fri Jun 06, 2008 9:26 am    Post subject: Reply with quote
try this
u need to add a loop. otherwise it will only check once/

Code:

switch( dwReason )
   {
   case DLL_PROCESS_ATTACH:
MessageBox( 0, "Attached!", 0, 0 );
   break;
   case DLL_PROCESS_DETACH:
      break;
   }

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Stylo
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PostPosted: Fri Jun 06, 2008 9:34 am    Post subject: Reply with quote
Bizarro wrote:
try this
u need to add a loop. otherwise it will only check once/

Code:

switch( dwReason )
   {
   case DLL_PROCESS_ATTACH:
MessageBox( 0, "Attached!", 0, 0 );
   break;
   case DLL_PROCESS_DETACH:
      break;
   }

so it suppose to pop up the message one time isnt it ?
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Bizarro
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PostPosted: Fri Jun 06, 2008 9:37 am    Post subject: Reply with quote
1qaz wrote:
Bizarro wrote:
try this
u need to add a loop. otherwise it will only check once/

Code:

switch( dwReason )
   {
   case DLL_PROCESS_ATTACH:
MessageBox( 0, "Attached!", 0, 0 );
   break;
   case DLL_PROCESS_DETACH:
      break;
   }

so it suppose to pop up the message one time isnt it ?


yea.
thats why createthread is suggested once its attached
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Last edited by Bizarro on Fri Jun 06, 2008 9:38 am; edited 1 time in total
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Flyte
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PostPosted: Fri Jun 06, 2008 9:37 am    Post subject: Reply with quote
Make sure you are not using the Dev-C++/Code::Blocks compiler, it messes with the .dll format and does not give it a proper entry point.

Compile it in MSVC 08 and it will work just fine. Smile
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DeletedUser14087
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PostPosted: Fri Jun 06, 2008 10:26 am    Post subject: Reply with quote
tombana wrote:
It's not necessary to use CreateThread. It should work fine. Try removing if(dwReason....) part.


If he'll remove that compare statement how can it detect if he injected or not ? he wants to make sure a successful injection.
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Estx
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PostPosted: Fri Jun 06, 2008 10:27 am    Post subject: Reply with quote
MessageBoxA instead of MessageBox should work fine for minesweeper.

Code:
#include <windows.h>

BOOL APIENTRY DllMain ( HINSTANCE hInst, DWORD dwReason, LPVOID reserved )
{
      if( dwReason == DLL_PROCESS_ATTACH )
            MessageBoxA(0, "Attached!", 0, 0);
     return TRUE;
}
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tombana
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PostPosted: Fri Jun 06, 2008 10:39 am    Post subject: Reply with quote
Rot1 wrote:
tombana wrote:
It's not necessary to use CreateThread. It should work fine. Try removing if(dwReason....) part.


If he'll remove that compare statement how can it detect if he injected or not ? he wants to make sure a successful injection.

I meant just for testing, to make sure the problem is not that part. If you would remove it, the messagebox would be displayed when injection is succesfull, but also when a new thread is created or when the process is quit.
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HalfPrime
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PostPosted: Fri Jun 06, 2008 10:56 am    Post subject: Reply with quote
For dev-cpp, atleast, try compiling it as C instead of C++.
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ShurikeN
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PostPosted: Fri Jun 06, 2008 5:23 pm    Post subject: Reply with quote
HalfPrime wrote:
For dev-cpp, atleast, try compiling it as C instead of C++.

great! it worked. Although i tried in CodeBlocks but no luck. now i have to use old Dev-C++ for DLL programming Shocked
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atom0s
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PostPosted: Fri Jun 06, 2008 6:55 pm    Post subject: Reply with quote
ShurikeN wrote:
HalfPrime wrote:
For dev-cpp, atleast, try compiling it as C instead of C++.

great! it worked. Although i tried in CodeBlocks but no luck. now i have to use old Dev-C++ for DLL programming Shocked


Just upgrade to Visual Studio. A lot less of a hassle.
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ShurikeN
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PostPosted: Fri Jun 06, 2008 8:03 pm    Post subject: Reply with quote
i love visual studio but i prefer to use CodeBlocks because its installer is light (about 20mb only). The fact that i don't have my own PC i just store the installer in my flashdisk and port it whenever i sit on someone's PC.
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