i am trying to hook the CreateProcess under cmd.exe. i manage to inject the dll the the cmd process but after the injection the dll process detach message receive and i fail to hook the createprocess function call. i am using easyhook. my code:
#include <windows.h>
#include <Shlwapi.h>
#include <tchar.h>
#include <stdio.h>
#include <strsafe.h>
#include <easyhook.h>
BOOL WINAPI myCreateProcess(
_In_opt_ LPCTSTR lpApplicationName,
_Inout_opt_ LPTSTR lpCommandLine,
_In_opt_ LPSECURITY_ATTRIBUTES lpProcessAttributes,
_In_opt_ LPSECURITY_ATTRIBUTES lpThreadAttributes,
_In_ BOOL bInheritHandles,
_In_ DWORD dwCreationFlags,
_In_opt_ LPVOID lpEnvironment,
_In_opt_ LPCTSTR lpCurrentDirectory,
_In_ LPSTARTUPINFO lpStartupInfo,
_Out_ LPPROCESS_INFORMATION lpProcessInformation
){
OutputDebugString(L"\n !!!!!! In CreateProcess HOOK\n !!!!!!!!");
return CreateProcessW(lpApplicationName, lpCommandLine, lpProcessAttributes, lpThreadAttributes, bInheritHandles, dwCreationFlags, lpEnvironment, lpCommandLine, lpStartupInfo, lpProcessInformation);
}
BOOL APIENTRY DllMain(HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
BOOL bErrorFlag = FALSE;
DWORD dwBytesToWrite = (DWORD)strlen(DataBuffer);
DWORD dwBytesWritten = 0;
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
{
HOOK_TRACE_INFO hHook = { NULL }; // keep track of our hook
// Install the hook
NTSTATUS result = LhInstallHook(
GetProcAddress(GetModuleHandle(TEXT("kernel32")), "CreateProcessW"),
myCreateProcess,
NULL,
&hHook);
if (FAILED(result))
{
OutputDebugString(L"!!!!!!!!!!!FAIL!!!!!!!!");
return 1;
}
ULONG ACLEntries[1] = { 0 };
LhSetInclusiveACL(ACLEntries, 1, &hHook);
OutputDebugString(L"!!!!!!!!!!!!Injection Succeed!!!!!!!!!!!!");
break;
}
case DLL_THREAD_ATTACH:{
OutputDebugString(L"!!!!!!!!!!!!dll thread attach!!!!!!!!!!!!");
break;
}
case DLL_THREAD_DETACH:
{
OutputDebugString(L"!!!!!!!!!!!!dll thread Detach!!!!!!!!!!!!");
break;
}
case DLL_PROCESS_DETACH:
{
OutputDebugString(L"!!!!!!!!!!!!dll process Detach!!!!!!!!!!!!");
break;
}
}
}
i receive the "Injection Succeed" message and right after the "dll process Detach" message . any ideas?
try changing :
LhSetInclusiveACL(ACLEntries, 1, &hHook);
to :
LhSetExclusiveACL(ACLEntries, 1, &hHook);