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Server Sending Spam Problem

Discussion in 'E-mail Discussions' started by drupalin, Dec 30, 2016.

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  1. drupalin

    drupalin Registered

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    Hi everyone, i´m kind of desesperate, my server sends spam from email acounts very similar to the real one.

    Real Mail Account: info@example.com

    Spammers:
    info115@example.com
    info116@example.com
    info117@example.com
    info118@example.com
    info119@example.com
    ....

    After of write this: grep cwd /var/log/exim_mainlog|grep -v /var/spool|awk -F"cwd=" '{print $2}'|awk '{print $1}'|sort|uniq -c|sort -n

    I get this details:
    Code:
    1 /home/biovidrio/public_html

1 /home/meollo/public_html

1 /home/tyd/public_html

1 /home/webes/public_html/base

1 /home/webes/public_html/clinicadental

1 /home/webes/public_html/serviamb

1 /var/log

2 /home/adventurerooms/public_html

2 /home/webes/public_html/tienda

3 /home/enigmabohemia/public_html

3 /home/legionella/public_html

4 /home/ruraly/public_html

4 /home/webes/public_html

4 /home/webtematica/public_html

5 /home/actormania/public_html

5 /home/albertogorgojo/public_html

5 /home/algodonmerlin/public_html

5 /home/antonioaznar/public_html

5 /home/elperiodismo/public_html

5 /home/fisioterapia/public_html

5 /home/fontanerosmadrid/public_html

5 /home/inmobiliaria/public_html

5 /home/kristianboys/public_html

5 /home/serviamb/public_html

6 /home/disenowebmadrid/public_html

7 /home/costurasnontol/public_html

7 /home/cursoderevit/public_html

8 /tmp

14 /home/portalclasico/public_html

78 /

110 /usr/local/apache/domlogs/portalclasico

181 /home

960 /root

6748 /usr/local/cpanel/whostmgr/docroot
    So it seems its root user witch sends spam, but i can not find a way to get the spammer script


    Thanks very much
     
    #1 drupalin, Dec 30, 2016
    Last edited by a moderator: Dec 30, 2016
  2. SysSachin

    SysSachin Well-Known Member

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    Hello,

    It's seems the mail sending from account using php mail script. I think there is infected file under the account which is sending mails.

    Please try to check logs using below command so that you will get account account which is sending mail.

    Code:
    tail -n2000 /var/log/exim_mainlog|grep /home/
     
    #2 SysSachin, Dec 30, 2016
  3. drupalin

    drupalin Registered

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    Thanks for the replay, i´m only get this details:

    Code:
    2016-12-30 11:42:37 [3507] cwd=/home/someusr/public_html 4 args: /usr/sbin/sendmail -t -i -finfo@example.com
     
    #3 drupalin, Dec 30, 2016
    Last edited by a moderator: Dec 30, 2016
  4. SysSachin

    SysSachin Well-Known Member

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    #4 SysSachin, Dec 30, 2016
  5. rpvw

    rpvw Well-Known Member

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    Remember this may not be an infected script, and may not be detected by antivirus or malware detection software.

    Check for things like unpatched versions ( eg PHPMailer that has just had 2 critical updates in 3 days, and which may well be being actively exploited.) and any other php scripts that might be installed.
     
    #5 rpvw, Dec 30, 2016
  6. drupalin

    drupalin Registered

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    Thanks for the replay, i check with malded and clam, but not show results, about PHPMailer, not know what to do or update

    Any ideas, thanks very much in advance and happy new year
     
    #6 drupalin, Dec 30, 2016
    Last edited by a moderator: Dec 31, 2016
  7. drupalin

    drupalin Registered

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    I repeat the grep cwd /var/log/exim_mainlog|grep -v /var/spool|awk -F"cwd=" '{print $2}'|awk '{print $1}'|sort|uniq -c|sort -n and this is the result

    Code:
    1
      1 /home/actormania/public_html
      1 /home/albertogorgojo/public_html
      1 /home/algodonmerlin/public_html
      1 /home/antonioaznar/public_html
      1 /home/costurasnontol/public_html
      1 /home/cursoderevit/public_html
      1 /home/disenowebmadrid/public_html
      1 /home/elperiodismo/public_html
      1 /home/enigmabohemia/public_html
      1 /home/fisioterapia/public_html
      1 /home/fontanerosmadrid/public_html
      1 /home/inmobiliaria/public_html
      1 /home/kristianboys/public_html
      1 /home/ruraly/public_html
      1 /home/serviamb/public_html
      1 /home/webes/public_html
      3 /home/webtematica/public_html
    164 /root
    318 /
   3700 /usr/local/cpanel/whostmgr/docroot
     
    #7 drupalin, Jan 1, 2017
  8. NOC_Serverpoint

    NOC_Serverpoint Well-Known Member

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    Hi,

    Following command that will show you the script which is using script to send the email. If it is from php then use


    # egrep -R "X-PHP-Script" /var/spool/exim/input/*

    Thanks,
     
    #8 NOC_Serverpoint, Jan 3, 2017
  9. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello,

    The following document is a good place to start:

    How to Prevent Email Abuse - cPanel Knowledge Base - cPanel Documentation

    In particular, review the section titled "Experimental: Rewrite From: header to match actual sender":

    Thank you.
     
    #9 cPanelMichael, Jan 6, 2017
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