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HELP! Somebody has hijacked my email system

Discussion in 'E-mail Discussion' started by sexy_guy, Apr 14, 2003.

  1. sexy_guy

    sexy_guy Well-Known Member

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    I have over 600 of these going out from my server right now, i just caught it, and i cant find the source!!!!

    2003-04-14 15:07:03 195C6Q-0004zd-00 <= nobody@my.server.com H=localhost (my.server.com) [127.0.0.1] P=esmtp X=TLSv1:DES-CBC3-SHA:168 S=527120 id=E195AKc-00088X-00@myserver.com
    2003-04-14 15:07:03 195C6I-0004zJ-00 => pornomag6999@yaho.com R=lookuphost T=remote_smtp H=not.com [0.0.0.0] X=TLSv1:DES-CBC3-SHA:168
    2003-04-14 15:07:03 195C6I-0004zJ-00 Completed
    2003-04-14 15:07:08 195C6V-0004zr-00 <= nobody@my.server.com H=localhost (my.server.com) [127.0.0.1] P=esmtp X=TLSv1:DES-CBC3-SHA:168 S=527650 id=E195AKc-00088X-00@my.server.com
    2003-04-14 15:07:09 195C6Q-0004zd-00 => pornomag6999@yaho.com R=lookuphost T=remote_smtp H=not.com [0.0.0.0] X=TLSv1:DES-CBC3-SHA:168

    The only thing i can do it shut down Exim to stop it. How can i find out who this is? :mad: Thats because cpanel allows messages to be send out of the server as nobody!
     
    #1 sexy_guy, Apr 14, 2003
    Last edited: Apr 14, 2003
  2. xsenses

    xsenses Well-Known Member

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    Can't you stop "nobody" from sending email in WHM?
     
    #2 xsenses, Apr 14, 2003
  3. sexy_guy

    sexy_guy Well-Known Member

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    Nope, so far they cant do it, isnt it amazing look at this

    12-13 53 ....
    13-14 616 ...................................................
    14-15 394 ................................
    15-16 83 ......

    sent in 1hr as nobody! Im still trying to stop this crap from leaving my server.
     
    #3 sexy_guy, Apr 14, 2003
  4. dgbaker

    dgbaker Well-Known Member
    PartnerNOC

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    In WHM - Tweak Settings.

    Prevent the user 'nobody' from sending out mail to remote addresses (php and cgi scripts generally run as nobody if you are not using phpsuexec and suexec respectively.)
     
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    #4 dgbaker, Apr 14, 2003
  5. sexy_guy

    sexy_guy Well-Known Member

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    I did that already and that doesnt work dgbaker. I just finished installing a mail monitor script that will tell me whos sending it. Any msgs over 5 msgs will halt the sender.
     
    #5 sexy_guy, Apr 14, 2003
  6. sexy_guy

    sexy_guy Well-Known Member

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    Dont know how this phpsuexec works but after i recompiled my system last night to include it Squirrelmail was inaccessible throughout the entire system. And we had all kinds of permission problems all over the server.
     
    #6 sexy_guy, Apr 14, 2003
  7. sexy_guy

    sexy_guy Well-Known Member

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    Very strange, it doesnt seem to be coming from my server. Wait localhost coming in then going straight out? I dont get this.
     
    #7 sexy_guy, Apr 14, 2003
  8. sexy_guy

    sexy_guy Well-Known Member

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    anyone know how i can setup an exim rule to prevent delivery of messages to a domain..

    These messages are being sent to NOT.COM that has an ip of 0.0.0.0.
     
    #8 sexy_guy, Apr 14, 2003
  9. Radio_Head

    Radio_Head Well-Known Member

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    I had this problem some weeks ago when a client asked me to
    modify Mail A Record .... modifing this parameter he was able to send spam ...

    Removing that value , spammer was stopped .

    Perhaps is it your problem too ?
     
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    #9 Radio_Head, Apr 15, 2003
  10. sexy_guy

    sexy_guy Well-Known Member

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    Can you write a howto on this? I mean installing it is easy however what about all the file persmissions. This is a nighmare. When i did install it i had to remove it moments after the compile because everthing stopped working, permission problems all over the place, paths not found etc etc. Good thing it was 3am otherwise our users would have killed us.
     
    #10 sexy_guy, Apr 15, 2003
  11. sexy_guy

    sexy_guy Well-Known Member

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    We dont allow our users to modify MX records but this is what we found out. The guy used a sites E-Greeting card program to send out a greeting card to himself which he looped back to his origional email address then fired it off. This looped the program out of control. It stopped after 5hrs and 1,300+ emails later. We cannot recreate the problem so it seems it was a deliberate attempt. Amazing people.
     
    #11 sexy_guy, Apr 15, 2003
  12. jamesbond

    jamesbond Well-Known Member

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    I haven't tried phpsuexec myself, but regarding the permissions I think you could do something like this :

    find /home/*/public_html -name '*.php' -o -name '*.php[34]' -o -name '*.phtml' | xargs chmod -v a+x

    See:
    http://forums.cpanel.net/showthread.php?s=&threadid=8576
     
    #12 jamesbond, Apr 15, 2003
  13. sexy_guy

    sexy_guy Well-Known Member

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    Im really reluctant to change all the permissions only to find out it didnt work and be stuck with a bunch of nonworking sites. Has anyone done this and knows it works for sure?
     
    #13 sexy_guy, Apr 15, 2003
  14. Radio_Head

    Radio_Head Well-Known Member

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    No I am not talking of mx ... however it was a dns parameter ,
    I cannot remember now (perhaps Mail Record A).
     
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    #14 Radio_Head, Apr 15, 2003
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