#include <Windows.h>
#include <stdio.h>
#include <tchar.h>
#pragma comment(linker, "/section:.data,RWE")//.data段可执行
CHAR FuncExample[] = {
0x4c,0x8b,0xd1, //mov r10,rcx
0xb8,0xb9,0x00,0x00,0x00, //mov eax,0B9h
0x0f,0x05, //syscall
0xc3 //ret
};
typedef NTSTATUS(NTAPI* pNtAllocateVirtualMemory)(//函数指针
HANDLE ProcessHandle,
PVOID* BaseAddress,
ULONG_PTR ZeroBits,
PSIZE_T RegionSize,
ULONG AllocationType,
ULONG Protect);
DOUBLE GetAndSetSysCall(TCHAR* szFuncName) {
DWORD SysCallid = 0;
HMODULE hModule = GetModuleHandle(_T("ntdll.dll"));
DWORD64 FuncAddr = (DWORD64)GetProcAddress(hModule, (LPCSTR)szFuncName);
LPVOID CallAddr = (LPVOID)(FuncAddr + 4);
ReadProcessMemory(GetCurrentProcess(), CallAddr, &SysCallid, 4, NULL);
memcpy(FuncExample+4, (CHAR*)&SysCallid, 2);
return (DOUBLE)SysCallid;
}
int main() {
LPVOID Address = NULL;
SIZE_T uSize = 0x1000;
DOUBLE call = GetAndSetSysCall((TCHAR*)"NtAllocateVirtualMemory");
pNtAllocateVirtualMemory NtAllocateVirtualMemory = (pNtAllocateVirtualMemory)&FuncExample;
NTSTATUS status = NtAllocateVirtualMemory(GetCurrentProcess(), &Address, 0, &uSize, MEM_COMMIT, PAGE_READWRITE);
return 0;
}
