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#
# $Id: README.cmdexe,v 1.1 2004/12/31 18:54:22 provos Exp $
#

1. Description

   cmdexe.pl is a simple Perl script, that works with honeyd, to
   emulate a DOS command prompt.  It is useful to emulate a simple
   Windows "shell" backdoor, as used by many worms nowadays.  It logs
   the command line entered.  Non-printable characters are logged in
   hexdump format.


2. Dependencies

   cmdexe.pl needs Perl and a working honeyd environment.  For
   instructions on how to compile and configure honeyd, please refer
   to the honeyd website:

   http://www.honeyd.org/


3. Installation

   a. copy the cmdexe.pl script:

      # cp cmdexe.pl /full/path/cmdexe.pl
      # chmod 755 /full/path/cmdexe.pl

   b. create the LOGDIR directory:

      # mkdir -p /full/path/cmdexe
      # chown nobody:nobody /full/path/cmdexe

   c. edit your honeyd configuration file, adding something like:

      ###
      create backdoor
      set backdoor personality "Microsoft Windows XP Home Edition"
      set backdoor default tcp action reset
      set backdoor default udp action reset
      set backdoor default icmp action open
      set backdoor uid 32767 gid 32767
      # blaster
      add backdoor tcp port 4444 "/full/path/cmdexe.pl -p winxp -l /full/path/cmdexe"
      # sasser
      add backdoor tcp port 5554 "/full/path/cmdexe.pl -p winxp -l /full/path/cmdexe"
      add backdoor tcp port 9996 "/full/path/cmdexe.pl -p winxp -l /full/path/cmdexe"
      # dabber
      add backdoor tcp port 8967 "/full/path/cmdexe.pl -p winxp -l /full/path/cmdexe"
      add backdoor tcp port 9898 "/full/path/cmdexe.pl -p winxp -l /full/path/cmdexe"
      # lovgate
      add backdoor tcp port 20168 "/full/path/cmdexe.pl -p winxp -l /full/path/cmdexe"

      bind 192.0.2.1 backdoor
      ### change the IP above -- this is only an example.

   d. restart honeyd.


4. Logging

   cmdexe.pl logs all its activities to LOGDIR/logfile.  LOGDIR can be
   specified using the `-l' option.  If this option is not provided,
   LOGDIR defaults to `/var/cmdexe'.

   
5. Personalities

   The default personality is "winxp". Select one of the following
   personalities using the '-p' option: "win95", "win98", "winme",
   "winnt", "win2000", or "winxp".

   
6. License Information

   cmdexe.pl is Free Software.  For license details, please refer to
   the source code.


7. Obtaining new versions

   New versions of my cmdexe.pl are available at:
   http://www.honeynet.org.br/tools/


8. Reports and questions

   Please send comments, questions and bug reports to
   cordeiro@nic.br.


9. Acknowledgments

   The author would like to thank the Honeynet.BR Team and the
   Brazilian Honeypots Alliance for their ideas and help testing this
   tool.


# README ends here.