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Suspicious process running under user nobody

Discussion in 'General Discussion' started by a.sheipani, Aug 16, 2007.

  1. a.sheipani

    a.sheipani Member

    Jan 29, 2007
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    Hello everyone, this is a great forum, and i have a question for you
    i have LFD installed on one of our servers, and yesterday i received three e-mails from it stateing that a suspicious process running under user nobody, notice that we have phpsuexec enabled.

    this is the complete message.

    Time: Wed Aug 15 16:21:37 2007
    PID: 8423
    Account: nobody
    Uptime: 314 seconds



    Command Line (often faked in exploits):

    /usr/local/cpanel/bin/eximwrap GETDISKUSED info

    Network connections by the process (if any):

    tcp: ->
    tcp: ->

    Files open by the process (if any):


    Memory maps by the process (if any):

    002e5000-002ee000 r-xp 00000000 08:03 901190 /lib/
    002ee000-002ef000 r--p 00008000 08:03 901190 /lib/
    002ef000-002f0000 rw-p 00009000 08:03 901190 /lib/
    00460000-00476000 r-xp 00000000 08:03 906150 /lib/
    00476000-00477000 r--p 00015000 08:03 906150 /lib/
    00477000-00478000 rw-p 00016000 08:03 906150 /lib/
    0047a000-005a0000 r-xp 00000000 08:03 906160 /lib/tls/
    005a0000-005a2000 r--p 00125000 08:03 906160 /lib/tls/
    005a2000-005a4000 rw-p 00127000 08:03 906160 /lib/tls/
    005a4000-005a6000 rw-p 005a4000 00:00 0
    08048000-08052000 r-xp 00000000 08:03 5358009 /usr/local/cpanel/bin/cpwrap
    08052000-08053000 rw-p 00009000 08:03 5358009 /usr/local/cpanel/bin/cpwrap
    08053000-08074000 rw-p 08053000 00:00 0 b7ff5000-b7ff6000 rw-p b7ff5000 00:00 0 bfff7000-c0000000 rwxp bfff7000 00:00 0 ffffe000-fffff000 ---p 00000000 00:00 0

    can you please tell me if this is something i should worry about
    also i have been receiving e-mail about high server load at the same time as this message.
    and can you tell me what is cpwrap and what does it do??
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  2. bebop1065

    bebop1065 Active Member

    Apr 14, 2004
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    It might be something to worry about.

    I had the same thing on one of my servers earlier in the week. It turned out to be some scripts in /tmp that were attempting to send log details to a server running a chatroom on port 6667.

    I had the scripts removed and all seems good now.

    Have you run any root kit checkers to see if they catch anything?
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  3. dataferret

    dataferret Member

    Jul 20, 2007
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    Do you have any more details on what scripts were running in tmp? Name, file size etc? I seem to have this exact same problem and the only file which looks out of place in tmp is one which is named t00000 and has a file size of 47,000mb. I have renamed the file so it can be investigated further. I would very much like further details on the filenames you found in your tmp directory.

    Thanks for any help
  4. vanessa

    vanessa Well-Known Member

    Sep 26, 2006
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    Virginia Beach, VA
    cPanel Access Level:
    DataCenter Provider
    Other services can run processes as the user nobody, such as Apache and perl. To find nobody running processes, just run:

    ps -efww |grep nobody |more

    Then track the process ID with lsof -p <PID> to find out where it's coming from it it isn't obvious in the process listing.
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