Trojan C99Shell

Jul 1, 2009

I just installed zen cart on my webhosting and after few days later i saw some file written like core1405.php and when i open to view the file it is actually trojan c99shell.

I have deleted all of the core file. Now how can i prevent it from happen again? Cause it is too much work to clean up the hosting server.

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C99Shell :: How To Detect Or Disable The Functionality Of C99Shell

Jul 13, 2008

Recently my site was defaced, (i own a dedicated server), my server was not touched, but one of the applications I used on the site was exploited to gain access to it.

I have noticed 4 or 5 c99 shells in different locations on my ftp. The site is back online, but it's definitely possible that they have one of these hidden somewhere and that they'll just do it again. I am using cent os 5

How can I easily search for these on my box? Can I disable their functionality? is there setting I can use in htaccess or something to make my website safer? I visited one of the scripts, and it said SAFEMODE OFF, how can I at least enable safemode?

I don't know much of anything about linux, but I am running cpanel and WHM. I have a guy who manages my box but he is hard to get a hold of sometimes, and I'd like to take care of this ASAP!

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C99Shell Folders?

Jul 30, 2009

I found these folders in the root

/usr/bin/c99

/usr/include/boost/numeric/interval/detail/c99_rounding_control.hpp

/usr/include/boost/numeric/interval/detail/c99sub_rounding_control.hpp

what are these ? is it normal folders ? or somebody hacked our server?

what shall I do?

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C99Shell How To Stop

Nov 5, 2009

How to stops the scripts like c99 shell from installing into the server?

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Mod_security & C99shell Anyone Help Please ?

Jun 5, 2007

I installed modsecurity from Addone module in Cpanel

When I try to apply phpshell woork good without a mistakes and I can do anything despite of the presence of protection modsecurity and disable_functions in php.ini.

Is there a particular settings add to the httpd.conf to prevent application phpshell or prevent upload it to the site?

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C99Shell Hackers Killing Me!

Jun 25, 2007

guys im tired off fighting those hackers everyday! i have about 20 websites,and everyday i have one of them hacked! i restore a backup then another one hacked!

thats unbelivable!!!

those bastards upload there shell scripts to websites via bugs or whatever from php files!!

is there anyway to stop these commands?

can .htaccess helps? how?

i talked to my webhosting companies for my websites! ....

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C99shell Disable PHP Scripts?

Sep 3, 2007

the biggest security issue i have with my clients is php c99 shell and similar php files, somehow these files uploaded on the website and from here they start attacking the websites.
i have seen also that once you upload the c99 php file you are able to see the accounts information ( such as a user name ) on the same server

so is there any way to disable this kind of php file or at least disable some function within the file!

i have been thinking to install and run a antivirus on the server , but i see sometimes they upload the encrypted version of the file , so the antirus can't catch the file as a torjan!

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C99Shell :: Detect And Disable C99 Shell?

Aug 15, 2008

how i can detect and disable C99 shell and another shell script exp:r57 ....

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C99Shell :: Attack Rules For Mod_security

Oct 3, 2007

i want to prevent c99shell scripts from running.

I found this rule to detect URI's for the c99 shell.

#new kit
SecFilterSelective REQUEST_URI "/c99shell.txt"
SecFilterSelective REQUEST_URI "/c99.txt?"
My problem is that the hackers are being more stealthy and calling the
script some random name like .../myphpstuff.php. So the URI no longer helps detect it.

How could I detect "c99shell" in the actual file that apache servers? This assumes that the hacker was successfully in installing it.

my box

Apache 1.3.37
WHM 11.2.0 cPanel 11.11.0-R16983
FEDORA 5 i686 - WHM X v3.1.0

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C99Shell Stop Shell Hacking Totally?

Oct 19, 2007

Is there a way to stop them totally? i.e. even though they are successfully uploaded but I do not want the source to be available to them etc.?

I mean, is there a way to hide or not allow them to execute any shell?

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C99Shell :: Protect My Server For Shell Attacks Via C99 And H57?

Sep 1, 2008

I have few scripts, but hackers again upload at some way c99, and hack some SMF forums at server. Server like server they cannot hack, but user account they can. So please tell me what you advice?

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LKM Trojan?

Aug 20, 2007

I just installed a fresh copy of centos 4.5, updated some programs and installed chkrootkit. When i run # ./chkproc, it shows the following output:

# ./chkproc
You have 14 process hidden for readdir command
You have 14 process hidden for ps command

Searching for LKM trojans shows the following output:
# ./chkrootkit -x lkm

EXE 9994: /usr/sbin/named
CWD 9995: /var/named
EXE 9995: /usr/sbin/named
CWD 9996: /var/named
EXE 9996: /usr/sbin/named
CWD 9997: /var/named
EXE 9997: /usr/sbin/named
CWD 9998: /var/named
EXE 9998: /usr/sbin/named
CWD 26293: /var/lib/mysql
EXE 26293: /usr/sbin/mysqld
CWD 26294: /var/lib/mysql
EXE 26294: /usr/sbin/mysqld
CWD 26295: /var/lib/mysql
EXE 26295: /usr/sbin/mysqld
CWD 26296: /var/lib/mysql
EXE 26296: /usr/sbin/mysqld
CWD 26297: /var/lib/mysql
EXE 26297: /usr/sbin/mysqld
CWD 26298: /var/lib/mysql
EXE 26298: /usr/sbin/mysqld
CWD 26299: /var/lib/mysql
EXE 26299: /usr/sbin/mysqld
CWD 26300: /var/lib/mysql
EXE 26300: /usr/sbin/mysqld

When i stop mysql and named, and run # ./chkrootkit -x lkm again, it doesn't show anything. When i turn mysql and named back on, it starts complaining about compromises again.

Can it be a false alarm, or should i really be worried? What do you advise me to do now?

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What To Use To Scan For Trojan?

Jun 2, 2009

We have a client claming that she gets a Trojan warming when she trys to access her website but using the Trojan scan in cpanel doesn't show anything.

What can we use to scan for Trojan?

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15 POSSIBLE Trojan Detected WHM

Aug 3, 2007

i have an site on my server when i open it the kaspersky anti viruss detect there is an trojan in this site .. ( see the picture in the attachment )

and i checked the server from the whm and there is result 15 POSSIBLE Trojans Detected

How i can solve this ?? and remove this trojans .

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Trojan :: 687 POSSIBLE Trojans?

Mar 21, 2008

I just ran a scan for trojan horses in WHM and it came up with "687 POSSIBLE Trojans". WTH? Are these real trojan horses? If so, how do I remove them?

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PHP.Backdoor.Trojan

Apr 29, 2008

As usually I do monthly scan to all files on my site,today I download all backup site into my PC,then scanning them using Norton Antivirus and on one site files Norton detected PHP.Backdoor.Trojan.

I take a look file location and found current file with name xTgsj78Jn.txt

Then I go to my server where site hosted,and i go to the directory and found file above stay on there,I try many time to delete it but always get an error message "Permission denied",I try to change permission but always returned an error.

When deleted it i use command rm -r with root access,then I do ls -l and found details file like below.

-rwxrwxrwx 1 nobody nobody 137787 Mar 19 20:14 xTgsj78Jn.txt*

Please help me to delete this file.

FYI this file uploaded to my hosting file site.

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Trojan :: How To Clean Server?

Aug 7, 2007

my whm Trojan scanner found 23 possible Trojans.

how can i clean my server?

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Trojan-Downloader.JS.Psyme.hz

Aug 12, 2007

I have an hosting account at OXEO.com and I have trojan problems on all my websites

The index files of all my websites show a Trojan program called Trojan-Downloader.JS.Psyme.hz

I checked my websites on Google and Google is warning users for this kind of problems for one of my websites

Does anybody here has experienced the same problem?

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Possible Trojan List By WHM - Do I Need To Worry?

Nov 8, 2007

I ran the Trojan scan in WHM and it came up with the list below. I have a strong feeling WHM is mis-reporting these as trojans, but I thought I would ask the experts here:

Scan for Trojan Horses

Appears Clean

/dev/stderr

Scanning for Trojan Horses.....

Possible Trojan - /usr/bin/cpan
Possible Trojan - /usr/bin/instmodsh
Possible Trojan - /usr/bin/prove
Possible Trojan - /usr/bin/xmlcatalog
Possible Trojan - /usr/bin/xmllint
Possible Trojan - /usr/bin/xml2-config
Possible Trojan - /usr/lib/libxml2.la
Possible Trojan - /usr/bin/mysqlhotcopy
Possible Trojan - /usr/bin/Wand-config
Possible Trojan - /usr/bin/animate
Possible Trojan - /usr/bin/compare
Possible Trojan - /usr/bin/composite
Possible Trojan - /usr/bin/conjure
Possible Trojan - /usr/bin/convert
Possible Trojan - /usr/bin/display
Possible Trojan - /usr/bin/identify
Possible Trojan - /usr/bin/import
Possible Trojan - /usr/bin/mogrify
Possible Trojan - /usr/bin/montage
Possible Trojan - /usr/bin/curl-config
Possible Trojan - /usr/bin/curl
Possible Trojan - /usr/lib/libcurl.so.3.0.0
Possible Trojan - /usr/lib/python2.3/site-packages/libxml2mod.la
Possible Trojan - /usr/lib/python2.3/site-packages/libxml2mod.so
Possible Trojan - /usr/sbin/pureauth
25 POSSIBLE Trojans Detected

Is there anything that looks fishy here?

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How-to - Rootkit Scan (trojan Etc)

Jan 21, 2004

What is a rootkit? The following link is a very good read to answer that question.

http://linux.oreillynet.com/pub/a/li...4/rootkit.html

In Summary, a rootkit is a trojan installed on your Linux server after someone has broken into it. These files are used to cover the hackers tracks, and to give the hacker tools to do more dirty work from your server.

Usage:

1. su - (change to root user)
2. mkdir /usr/local/chkrootkit
3. wget ftp://ftp.pangeia.com.br/pub/seg/pac/chkrootkit.tar.gz
4. tar -xvzf chkrootkit.tar.gz
5. cd chkrootkit*
6. cp * /usr/local/chkrootkit
7. cd /usr/local/chkrootkit
8. make sense

Now scan your system:

1. cd /usr/local/chkrootkit
2. ./chkrootkit

chkrootkit may from time to time give false positives. If you ever get a positive or "infected hit" scan a second time. If you do get a positive hit, google the hit to research the issue and steps to correct.

Part 2 - automated chkrootkit, and emailed results.

I'm lazy, and like my server to do the work for me so I have it scan every day, and email me the results.

Usage:

1. vi /etc/cron.daily/chkrootkit
2. add the following code.

Code:
#!/bin/bash
(cd /usr/local/chkrootkit; ./chkrootkit -q 2>&1 | mail -s "Daily chkrootkt scan" you@yourdomain.com)
3. chmod 0755 /etc/cron.daily/chkrootkit

This will email you@yourdomain.com every morning with your chkrootkit results. the -q option will only show you exploits.

Removal:

If you don't like getting the emails or just want to remove this from your server:

1. rm /etc/cron.daily/chkrootkit
2. rm -rf /usr/local/chkrootkit

All files will now be deleted from your server.

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How To Remove Virus/Trojan

Dec 7, 2008

how can I remove a Virus/Trojan from my website?

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Websites Infected With Trojan How To Solve?

Nov 16, 2008

i see my websites are infected with some trojan.

there are some iframe tag simlilar to this in all index files

<iframe src="http://traff<<removed>>.cn/in.cgi?27" width=100 height=80></iframe>
any idea how might this iframe inserted in my codes.

i have tried to format my systems and remove all saved ftp passwords , but still this virus is comming back and the strange thing is i have website on different servers infected with same virus
any idea how this is happened and how to avoide this?

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Trojan-Downloader.JS.Psyme.hz Remover

Aug 3, 2007

can any body help me with the Trojan-Downloader.JS.Psyme.hz remover?

i can't find an remover for linux server for this trojan.

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Trojan-Clicker.HTML.IFrame.amh

Nov 6, 2009

I am not that technically proficient so I have to resort to shared hosting solutions...I am currently with Bluehost.

Problem: I have a small site with minimal needs in terms of storage and bandwidth, but the site is controversial and gets hacked and attacked a lot.

I need a shared hosting provider which ranks higher than most in terms of security.

Recently the site was attacked such that any user going to the site was infected with Trojan horse viruses.

Donno if it's useful or not but here are the files from my PC antivirus which was infected when I went to the site with IE:


File generated by Rogers Online Protection Anti-Virus

C:Documents and SettingsuserLocal SettingsTemporary Internet
FilesContent.IE5PG8E0SM0gifimg[1].htm Trojan-Clicker.HTML.IFrame.amh
Deleted 11/5/2009 12:21:25 AM
C:Documents and SettingsuserLocal SettingsTemporary Internet
FilesContent.IE5GC9JZWI3gifimg[2].htm Trojan-Clicker.HTML.IFrame.amh
Deleted 11/5/2009 12:21:27 AM
C:Documents and SettingsuserLocal SettingsTemporary Internet
FilesContent.IE5QBPA1ELgifimg[1].htm Trojan-Clicker.HTML.IFrame.amh
Deleted 11/5/2009 12:21:27 AM
C:Documents and SettingsuserLocal SettingsTemporary Internet
FilesContent.IE56SLECSUQgifimg[5].htm Trojan-Clicker.HTML.IFrame.amh
Deleted 11/5/2009 12:21:28 AM
C:Documents and SettingsuserLocal SettingsTemporary Internet
FilesContent.IE5EKTEAS82gifimg[5].htm Trojan-Clicker.HTML.IFrame.amh
Deleted 11/5/2009 12:21:28 AM
C:Documents and SettingsuserLocal SettingsTemporary Internet
FilesContent.IE5P5098OY4gifimg[4].htm Trojan-Clicker.HTML.IFrame.amh
Deleted 11/5/2009 12:21:29 AM
C:Documents and SettingsuserLocal SettingsTemporary Internet
FilesContent.IE5IPGNWAB0gifimg[1].htm Trojan-Clicker.HTML.IFrame.amh
Deleted 11/5/2009 12:21:30 AM
C:Documents and SettingsuserLocal SettingsTemporary Internet
FilesContent.IE55VT8B104gifimg[1].htm Trojan-Clicker.HTML.IFrame.amh
Deleted 11/5/2009 12:21:30 AM
C:Documents and SettingsuserLocal SettingsTemporary Internet
FilesContent.IE543XUDX83gifimg[2].htm Trojan-Clicker.HTML.IFrame.amh
Quarantined 11/5/2009 12:21:31 AM
C:Documents and SettingsuserLocal SettingsTemporary Internet
FilesContent.IE56SLECSUQgifimg[5].htm Trojan-Clicker.HTML.IFrame.amh
Quarantined 11/5/2009 12:22:18 AM
C:Documents and SettingsuserLocal SettingsTemporary Internet

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Trojan-Clicker.HTML.Iframe.g In My Website? What Is This??

Sep 4, 2007

I have a website and all works fine, but an user said me that uses kaspersky said me my website has an trojan i don't understand how this is possible, and i'l really worried.

the trojan that appears to my user is:

Trojan-Clicker.HTML.Iframe.g

someone know why i have this trojan?

Now the users refuses to open my website!! i'm more than worried

this is an printscreen of the error: ...

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Trojan Detected On Initial Load Of Site

Jan 8, 2008

I have 2 reseller accounts with one provider, and in the last several days I have noticed that when you visit the site for the first time, my AV software detects a trojan on the site, but the code & html files are 100% clean!

I'm suspecting that there is something being injected into the scripts from the server daemons that's either running or something else.

Anyone have any suggestions?

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Prevent Of Execution Trojan Shell Scripts, Like R57shell And Other?

Oct 27, 2006

Which configuration for php and server that prevent execute shell scripts?

Which funstions you recommend to disable?

Like shell_exec, passthru, proc_open, proc_close, proc_get-status, proc_nice, proc_terminate, exec, system, suexec, popen, pclose, dl, ini_set, virtual, set_time_limit

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/tmp/clamav-77e7bfdbb2d3872b/test2.exe: Trojan.Taskkill.A FOUND

Jun 11, 2007

What is the mining of following lines in temp folder. If i have been check daily /tmp folder
many /tmp/clamav are presented in mail server, and occupied the large amount of space in temp folder

/tmp/clamav-77e7bfdbb2d3872b/test1.exe: Worm.Mydoom.U FOUND

/tmp/clamav-77e7bfdbb2d3872b/test2.exe: Trojan.Taskkill.A FOUND

/tmp/clamav-77e7bfdbb2d3872b/test3.exe: Worm.Nyxem.D FOUND

/tmp/malware.zip: Infected.Archive FOUND

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Trojan Activity - Running Perl With High CPU Usage, With User Apache

Sep 5, 2007

Running programs named Perl with Heavy CPU usage, with the ownership of user apache.

We found the problem on Fedora 3 and Fedora 6.

In our case, it was the result of a Trojan activity.

Quick Solution

Check the cron jobs of user apache
crontab -u apache -e
*/1 * * * * perl /tmp/.tmp/tmpfile
delete the cronjob entry.
Also delete the file /tmp/.tmp/tmpfile
also added "apache" to the file /etc/cron.deny

That's all

Problem and solution in detail....

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Antivirus/trojan Remover/worms Remover For Servers?

Jun 6, 2009

You buy an anti virus for your computer , you run it it checks and get rid of Trojans and worms

OK fine

what about a dedicated server or vps?

how do you do that? what product people use to run and anti virus and get rid of all those worms and Trojans?

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