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About

Mailoney is a SMTP Honeypot I wrote just to have fun learning Python. There are various modules or types (see below) that provide custom modes to fit your needs. Happily accepting advise, feature or pull requests.

Installation

At this time, everything should be included in a Linux python environment. Simply follow the usage instructions.

NOTE: To get all of the features out of the schizo module, users may wish to install the python-libemu module, but Mailoney will run with out it.

Usage

usage: mailoney.py [-h] [-i <ip address>] [-p <port>] -s mailserver -t
                   {open_relay,postfix_creds,schizo_open_relay}

Command line arguments

optional arguments:
  -h, --help            show this help message and exit
  -i <ip address>       The IP address to listen on
  -p <port>             The port to listen on
  -s mailserver         A Name that'll show up as the mail server name
  -t {open_relay,	Type of Honeypot 
  	postfix_creds,
  	schizo_open_relay}

Types

Right now there are three types of Modules for Mailoney.

  • open_relay - Just a generic open relay, will attempt to log full text emails attempted to be sent.
  • postfix_creds - This module simply logs credentials from logon attempts.
  • schizo_open_relay - This module logs everything, developed by @botnet_hunter

Running

SMTP ports 25, 465, 587 are privileged ports and therefore require elevated permissions (i.e. Sudo). It is probaby not a good idea to run your honeypot with elevated permissions. As such, I strongly encourage you to use port forwarding.

Setting this up is easy, lets say we want to run Mailoney on port 2525 (a nice non-priveleged port).

IPTables example

We can redirect port 25 to port 2525 with IPtables: $ sudo iptables -t nat -A PREROUTING -p tcp --dport 25 -j REDIRECT --to-port 2525

UFW example

If you are using UFW, you can edit before.rules (/etc/ufw/before.rules) by adding the following to the beginning:

*nat
-F
:PREROUTING ACCEPT [0:0]
-A PREROUTING -p tcp --dport 25 -j REDIRECT --to-port 2525
COMMIT

Then run ufw reload and you are all set.

ToDo

  • Add modules for EXIM, Microsoft, others
  • Build in Error Handling
  • Add a Daemon flag to background process.
  • Secure this by not requiring elevated perms, port forward from port 25.
  • Database logging
  • Possible relay for test emails.
  • Make honeypot detection more difficult (e.g. fuzz mailoney with SMTP commands, catch exceptions, patch and profit)