Remote Logging Using Syslog And Logging Shell Commands Remotely

admin — Mon, 31 Oct 2011 03:35:46 +0000

While trying to come up with a simple keylogging solution that provides remote logging, I came across a pretty good solution of using the audit package and altering bash.

One of the problems I came across was that many of the keyloggers could not log any commands sent through a SSH connection - this does on Fedora anyways.

Edit /etc/rsyslog.conf and uncoment this line:

vi /etc/rsyslog.conf

*.* @192.168.18.1:514>/code>
<b>Note: this is where the remote server is.</b>
Install and run the following:
<code>yum install -y audispd-plugins pasacct

chkconfig psacct on

chkconfig rsyslog on

service rsyslog start

service psacct start

Edit the conf file to look like the following:

vi /etc/audisp/audisp-remote.conf
remote_server = 192.168.18.1

port = 514

##local_port =

transport = udp

Save the file and edit the following file:

vi /etc/audisp/plugins.d/syslog.conf
# This file controls the configuration of the

# syslog plugin. It simply takes events and writes

# them to syslog.
active = yes

direction = out

path = builtin_syslog

type = builtin

args = LOG_INFO

format = string

Save the file and restart rsyslog:

service rsyslog restart

Onto altering the bash shell, but first determine what version the system is using already:

# bash --version

GNU bash, version 4.1.2(1)-release (i386-redhat-linux-gnu)

Copyright (C) 2009 Free Software Foundation, Inc.

License GPLv3+: GNU GPL version 3 or later <<a href="http://gnu.org/licenses/gpl.html>
This">http://gnu.org/licenses/gpl.html>
This</a> is free software; you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law.

The version is 4.1.2, but GNU project has the next version of bash at 4.2 - so I am going to use that instead:

wget <a href="http://ftp.gnu.org/gnu/bash/bash-4.2.tar.gz

tar">http://ftp.gnu.org/gnu/bash/bash-4.2.tar.gz

tar</a> -xzvf bash-4.2.tar.gz

cd bash-4.2

Edit the config file and enable syslog by making the directive look as follows:

vi config-top.h
#define SYSLOG_HISTORY

#if defined (SYSLOG_HISTORY)

#  define SYSLOG_FACILITY LOG_USER

#  define SYSLOG_LEVEL LOG_INFO

#endif

Onto the building:

./configure

make

make install

Replace bash

mv bash bash2

mv bash2 /bin

cd /bin

bash2

mv bash bashorig

bashorig

mv bash2 bash

bash

Optional: rm bashorig -rf

service rsyslog restart

Now on your remote server syslog should be logging everything.

References

http://www.cyberciti.biz/tips/howto-log-user-activity-using-process-acco...
http://www.timkennedy.net/2010/12/07/recording-user-commands-to-syslog-o...
http://blog.rootshell.be/2009/02/28/bash-history-to-syslog/
http://www.gnu.org/software/bash/bash.html
http://serverfault.com/questions/202044/sending-audit-logs-to-syslog-server

Pacific Simplicity - ssh

Remote Logging Using Syslog And Logging Shell Commands Remotely

References

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