上图是一般的程序流程，下图是进行了控制流平坦化混淆的程序流程

可以看出来就是混淆让你看不出来，实战是这个样子的

实战

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 while ( 1 )
  {
    while ( 1 )
    {
      while ( 1 )
      {
        while ( 1 )
        {
          while ( 1 )
          {
            while ( 1 )
            {
              while ( 1 )
              {
                while ( 1 )
                {
                  while ( 1 )
                  {
                    while ( 1 )
                    {
                      while ( 1 )
                      {
                        while ( 1 )
                        {
                          while ( 1 )
                          {
                            v23 = v27;
                            v22 = v27 + 1132146882;
                            if ( v27 != -1132146882 )
                              break;
                            *v36 = v46 ^ v45;
                            (*v33)[(_QWORD)*v30] = *v36;
                            v27 = 541252275;
                          }
                          v21 = v23 + 1005509852;
                          if ( v23 != -1005509852 )
                            break;
                          v38 = (unsigned __int64)*v33;
                          v27 = 1110970360;
                        }
                        v20 = v23 + 911004694;
                        if ( v23 != -911004694 )
                          break;
                        v40 = v38 < v39;
                        v27 = 32509293;
                      }
                      v19 = v23 + 290148803;
                      if ( v23 != -290148803 )
                        break;
                      *v33 = v48;
                      v27 = 2049158165;
                    }
                    v18 = v23 - 32509293;
                    if ( v23 != 32509293 )
                      break;
                    v5 = 1712900817;
                    if ( v40 )
                      v5 = 1761996910;
                    v27 = v5;
                  }
                  v17 = v23 - 509491216;
                  if ( v23 != 509491216 )
                    break;
                  v29 = (const char **)&v6;
                  v30 = &v6;
                  v31 = &v6;
                  v32 = &v6;
                  v33 = &v6;
                  v34 = &v6;
                  v35 = &v6;
                  v36 = (unsigned __int8 *)(&v6 - 2);
                  s = v25;
                  v6 = v24;
                  v27 = 1926711538;
                }
                v16 = v23 - 541252275;
                if ( v23 != 541252275 )
                  break;
                v47 = *v33;
                v27 = 795171278;
              }
              v15 = v23 - 746586984;
              if ( v23 != 746586984 )
                break;
              *v31 = (unsigned __int8 *)v37;
              v4 = strlen(*v29);
              *v32 = (unsigned __int8 *)v4;
              *v33 = 0LL;
              v27 = -1005509852;
            }
            v14 = v23 - 795171278;
            if ( v23 != 795171278 )
              break;
            v48 = v47 + 1;
            v27 = -290148803;
          }
          v13 = v23 - 1110970360;
          if ( v23 != 1110970360 )
            break;
          v39 = (unsigned __int64)*v31;
          v27 = -911004694;
        }
        v12 = v23 - 1117683297;
        if ( v23 != 1117683297 )
          break;
        *(_BYTE *)v34 = i[(_QWORD)in];
        key1 = *v29;
        v44 = *v32 - 1;
        v27 = 1422522285;
      }
      v11 = v23 - 1422522285;
      if ( v23 != 1422522285 )
        break;
      *(_BYTE *)v35 = v44[(_QWORD)key1 - (unsigned __int64)*v33 % (unsigned __int64)*v32];
      v45 = *(unsigned __int8 *)v34;
      v46 = *(_BYTE *)v35;
      v27 = -1132146882;
    }
    result = (unsigned int)(v23 - 1712900817);
    v10 = v23 - 1712900817;
    if ( v23 == 1712900817 )
      break;
    v9 = v23 - 1761996910;
    if ( v23 == 1761996910 )
    {
      in = s;
      i = *v33;
      v27 = 1117683297;
    }
    else
    {
      v8 = v23 - 1926711538;
      if ( v23 == 1926711538 )
      {
        v37 = strlen(s);
        v27 = 746586984;
      }
      else
      {
        v7 = v23 - 2049158165;
        if ( v23 == 2049158165 )
          v27 = -1005509852;
      }
    }
  }
  return result;
}

可以去平坦但比较麻烦，当然也可以看汇编去做，首先先下断点，因为他是平坦的，就像是分发器，让程序进行操作

所以可以在每个小程序前进行断点，看这里像不像一个处理终端，把输入进来的程序分流发配，按照这个思路，就可以一段段去看完整的代码，要细心