Re: [CERT] Re: Compromised FBSD/Apache

From: ePAc (epacat_private)
Date: Mon Nov 25 2002 - 10:11:22 PST

  • Next message: gminick: "Re: increased attacks on port 2599"

    lsof would be able to show you the neccessary output.
    It will give you files that are open, their "State" and what the process
    name is, as well as their PID (and you can figure out the path with
    something like "ps auxwww | grep $PID"
    
    Here is a sample output of lsof (edited for content):
    
    --
    COMMAND    PID   USER   FD   TYPE     DEVICE    SIZE      NODE NAME
    dhcpcd      49   root  cwd    DIR        3,2    4096         2 /
    dhcpcd      49   root  rtd    DIR        3,2    4096         2 /
    dhcpcd      49   root  txt    REG        3,2   32480   1669996 /sbin/dhcpcd
    dhcpcd      49   root  mem    REG        3,2  435016     33054 /lib/ld-2.2.5.so
    dhcpcd      49   root  mem    REG        3,2 5029105     33057 /lib/libc-2.2.5.so
    dhcpcd      49   root    0u   CHR        1,3            360205 /dev/null
    dhcpcd      49   root    1u   CHR        1,3            360205 /dev/null
    dhcpcd      49   root    2u   CHR        1,3            360205 /dev/null
    dhcpcd      49   root    3u  sock        0,0                40 can't identify protocol
    dhcpcd      49   root    4u  IPv4         41               UDP *:bootpc
    dhcpcd      49   root    5u  unix 0xcf0d4a90              1685 socket
    sshd        70   root  cwd    DIR        3,2    4096         2 /
    sshd        70   root  rtd    DIR        3,2    4096         2 /
    sshd        70   root  txt    REG        3,2  290208   2226684 /usr/sbin/sshd
    sshd        70   root  mem    REG        3,2  435016     33054 /lib/ld-2.2.5.so
    sshd        70   root  mem    REG        3,2   43172     33078 /lib/libutil-2.2.5.so
    sshd        70   root  mem    REG        3,2   55668    589606 /usr/lib/libz.so.1.1.4
    sshd        70   root  mem    REG        3,2  353351     33065 /lib/libnsl-2.2.5.so
    sshd        70   root  mem    REG        3,2  757368    589303 /usr/lib/libcrypto.so.0.9.6
    sshd        70   root  mem    REG        3,2   70355     33058 /lib/libcrypt-2.2.5.so
    sshd        70   root  mem    REG        3,2 5029105     33057 /lib/libc-2.2.5.so
    sshd        70   root  mem    REG        3,2   61247     33062 /lib/libdl-2.2.5.so
    sshd        70   root    0u   CHR        1,3            360205 /dev/null
    sshd        70   root    1u   CHR        1,3            360205 /dev/null
    sshd        70   root    2u   CHR        1,3            360205 /dev/null
    sshd        70   root    3u  IPv4         76               TCP *:ssh (LISTEN)
    <... SNIP ...>
    dhcpd      178   root  cwd    DIR        3,2    4096   1735010 /root
    dhcpd      178   root  rtd    DIR        3,2    4096         2 /
    dhcpd      178   root  txt    REG        3,2  464340   2226663 /usr/sbin/dhcpd
    dhcpd      178   root  mem    REG        3,2  435016     33054 /lib/ld-2.2.5.so
    dhcpd      178   root  mem    REG        3,2 5029105     33057 /lib/libc-2.2.5.so
    dhcpd      178   root  mem    REG        3,2   18756     33067 /lib/libnss_db-2.2.so
    dhcpd      178   root  mem    REG        3,2  233089     33069 /lib/libnss_files-2.2.5.so
    dhcpd      178   root  mem    REG        3,2  494600     33059 /lib/libdb-3.1.so
    dhcpd      178   root    0w   REG        3,2    1510   1212044 /var/state/dhcp/dhcpd.leases
    dhcpd      178   root    3u  unix 0xcedba0a0               197 socket
    dhcpd      178   root    4u   raw                          198 00000000:0001->00000000:0000 st=07
    dhcpd      178   root    7u  IPv4        201               UDP *:bootps
    <... SNIP ...>
    lsof      2369   root  cwd    DIR        3,2    4096   1735010 /root
    lsof      2369   root  rtd    DIR        3,2    4096         2 /
    lsof      2369   root  txt    REG        3,2   89712    556931 /usr/bin/lsof
    lsof      2369   root  mem    REG        3,2  435016     33054 /lib/ld-2.2.5.so
    lsof      2369   root  mem    REG        3,2 5029105     33057 /lib/libc-2.2.5.so
    lsof      2369   root    0u   CHR        4,2            360329 /dev/tty2
    lsof      2369   root    1w   REG        3,2       0   1735946 /root/lsof.output
    lsof      2369   root    2u   CHR        4,2            360329 /dev/tty2
    lsof      2369   root    3r   DIR        0,3       0         1 /proc
    lsof      2369   root    4r   DIR        0,3       0 155254792 /proc/2369/fd
    lsof      2369   root    5w  FIFO        0,6             12122 pipe
    lsof      2369   root    6r  FIFO        0,6             12123 pipe
    lsof      2370   root  cwd    DIR        3,2    4096   1735010 /root
    lsof      2370   root  rtd    DIR        3,2    4096         2 /
    lsof      2370   root  txt    REG        3,2   89712    556931 /usr/bin/lsof
    lsof      2370   root  mem    REG        3,2  435016     33054 /lib/ld-2.2.5.so
    lsof      2370   root  mem    REG        3,2 5029105     33057 /lib/libc-2.2.5.so
    lsof      2370   root    4r  FIFO        0,6             12122 pipe
    lsof      2370   root    7w  FIFO        0,6             12123 pipe
    
    
    
    I hope this helps...
    
    Jok
    
    On Fri, 22 Nov 2002, Thomas C. Meggs wrote:
    
    > Date: Fri, 22 Nov 2002 11:28:21 -0500
    > From: Thomas C. Meggs <tomat_private>
    > To: Micheal Patterson <michealat_private>
    > Cc: incidentsat_private
    > Subject: [CERT] Re: Compromised FBSD/Apache
    >
    > Hi,
    >
    > Out of curiosity what is the Linux and Solaris equivalents for doing
    > this? I did a quick check under Linux and didn't see any similarly named
    > programs, and the UNIX Rosetta Stone wasn't much help either. Thanks!
    >
    > Regards,
    > Tom
    >
    > Micheal Patterson wrote:
    >
    > >
    > > ----- Original Message -----
    > > From: "Greg A. Woods"
    > > To: "Greg S. Wirth"
    > > Cc:
    > > Sent: Monday, November 18, 2002 11:49 AM
    > > Subject: Re: Compromised FBSD/Apache
    > >
    > >
    > >
    > > >[ On Saturday, November 16, 2002 at 08:11:44 (-0900), Greg S. Wirth
    > >
    > > wrote: ]
    > >
    > > >>Subject: Compromised FBSD/Apache
    > > >>
    > > >>Hello...
    > > >>November 14, 2002 I noticed a service running on port 127/tcp.
    > > >>The box runs only Apache, no SSL.
    > > >>Only open ports before this were 21/22/80
    > > >>PHP was installed 5 days prior to this.
    > > >>PHP runs in safemode.
    > > >>I run netstat -an every morning, which is how I found the issue.
    > > >
    > > >"fstat" is your friend -- it can tell you which process holds the
    > > >listening socket descriptor.  On FreeBSD you have to use 'netstat -aAn'
    > > >first to find the address of the protocol control block (PCB), and then
    > > >grep for that in the output of 'fstat'.  For example:
    > > >
    > > >12:44 [6] $ netstat -aAn | fgrep '*.80'
    > > >c49e0a40 tcp4       0      0  *.80               *.*
    > > LISTEN
    > > >12:44 [7] $ fstat | fgrep c49e0a40
    > > >wwwsrvr  thttpd       137    5* internet stream tcp c49e0a40
    > > >
    > > >
    > > >--
    > > >Greg A. Woods
    > > >
    > > >+1 416 218-0098;            ;
    > >
    > >
    > >
    > > >Planix, Inc. ; VE3TCP; Secrets of the Weird
    > >
    > >
    > >
    > > >--------------------------------------------------------------------------
    > >
    > > --
    > >
    > > >This list is provided by the SecurityFocus ARIS analyzer service.
    > > >For more information on this free incident handling, management
    > > >and tracking system please see: http://aris.securityfocus.com
    > > >
    > >
    > >
    > > "sockstat" on later versions of FreeBSD will also show you the daemon
    > > running on the port.
    > >
    > > micheal@/>sockstat |more
    > > USER     COMMAND    PID   FD PROTO  LOCAL ADDRESS         FOREIGN ADDRESS
    > > root     sshd     62252    5 tcp4   192.168.1.1:22        192.168.1.2:3777
    > > root     sshd       207    4 tcp4   *:22                  *:*
    > >
    > >
    > > --
    > >
    > > Micheal Patterson
    > > Network Administration
    > > Cancer Care Network
    > >
    > >
    > >
    > > ----------------------------------------------------------------------------
    > > This list is provided by the SecurityFocus ARIS analyzer service.
    > > For more information on this free incident handling, management
    > > and tracking system please see: http://aris.securityfocus.com
    >
    >
    >
    >
    > ----------------------------------------------------------------------------
    > This list is provided by the SecurityFocus ARIS analyzer service.
    > For more information on this free incident handling, management
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    >
    
    ---
    Nothing is foolproof to a sufficiently talented fool...
      oo
    ,(..)\
      ~~
    
    
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