[mark] first shellcode

好久没写博客了，今天终于搞出了第一个shellcode，以此mark一下。

#include "stdafx.h"
#include <Windows.h>
#include <tchar.h>


int _tmain(int argc, _TCHAR* argv[])

{    
    HMODULE hm = LoadLibrary(_T("kernel32.dll"));
    int addr = (int)GetProcAddress(hm, "WinExec");
    int exitaddr = (int)GetProcAddress(hm, "ExitProcess");
    printf("the address is %2x\r\nthe exitaddris %2x", addr, exitaddr);

    char buf[] = {
        "\x33\xc0"                   //xor    eax,eax
        "\x50"                            //push   eax
        "\xb8\x2e\x65\x78\x65"          //mov    eax,0x6578652e
        "\x50"                      //push   eax
        "\xb8\x63\x61\x6c\x63"          //mov    eax,0x636c6163
        "\x50"                      //push   eax
        "\x89\xe0"                   //mov    eax,esp
        "\x6a\x05"                   //push   0x5
        "\x50"                      //push   eax
        "\xb8\xa0\xf8\x0a\x77"          //mov    eax,770af8a0
        "\xff\xd0"                   //call   eax
        "\x33\xc0"                   // xor eax, eax
        "\x50"                      //push eax
        "\xb8\xb0\xad\x07\x77" //mov eax,7707adb0
        "\xff\xd0"             //call eax
        };
    /*    
    char buf[] = {
        0x33, 0xc0,                   //xor    eax,eax
        0x50    ,                        //push   eax
        0xb8, 0x2e, 0x65, 0x78, 0x65,          //mov    eax,0x6578652e
        0x50,                     //push   eax
        0xb8, 0x63, 0x61, 0x6c, 0x63,          //mov    eax,0x636c6163
        0x50,                      //push   eax
        0x89, 0xe0,                   //mov    eax,esp
        0x6a, 0x05,                   //push   0x5
        0x50,                      //push   eax
        0xb8, 0xa0, 0xf8, 0x0a, 0x77,          //mov    eax,770af8a0
        0xff, 0xd0,                   //call   eax
        0x33, 0xc0,                   // xor eax, eax
        0x50,                      //push eax
        0xb8, 0xb0, 0xad, 0x07, 0x77, //mov eax,7707adb0
        0xff, 0xd0             //call eax
        };
        */
    __asm{
        lea ecx, buf
        call ecx
    }
    
    /*
    
    __asm{
        xor eax, eax
        push eax
        mov eax, 0x6578652E
        push eax
        mov eax, 0x636C6163
        push eax
        mov eax, esp
        push 5
        push eax
        mov eax, 0x770af8a0
        call eax
    }
    */
    //WinExec("calc.exe", SW_SHOW);
    ExitProcess(0);
    return 0;
    
}