readc.c

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
int main()
{
    char v1[1000]; // ebx@3
    signed int result; // eax@7
    DWORD BytesReturned; // [sp+Ch] [bp-1Ch]@2
    char OutBuffer[1000]; // [sp+10h] [bp-18h]@2
    LONG lDistanceToMove = 512; // [sp+24h] [bp-4h]@3

    HANDLE v0 = CreateFileA("\\\\.\\C:", GENERIC_READ, 3, 0, 3, 0, 0);
    if ( v0 )
    {
        if ( DeviceIoControl(v0, 0x70000u, 0, 0, OutBuffer, 0x18u, &BytesReturned, 0) )
        {
            //v1 = LocalAlloc(0, 10 * lDistanceToMove);
            if ( v1 )
            {
                SetFilePointer(v0, lDistanceToMove, 0, 0);
                ReadFile(v0, v1, 512, &BytesReturned, 0);
                int i = 0;
                int cnt = 0;
                for(i = 0 ; i < 512 ; i++)
                {
                    printf("%02x ", v1[i]&0xff);
                    cnt++;
                    if(cnt == 16)
                    {
                        puts("");
                        cnt = 0;
                    }

                }
                LocalFree(v1);
            }
        }
        CloseHandle(v0);
    }

    printf("Hello world!\n");
    system("pause");

    return 0;
}