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Host Based IDS - Tripwire
2011/04/27 |
| [1] | Install Host based IDS ( Intrusion Detection System ), Tripwire. |
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[root@www ~]# yum --enablerepo=epel -y install tripwire # install from EPEL [root@www ~]# tripwire-setup-keyfiles # input pass-phrase during installation like follows Enter the site keyfile passphrase: # (1) set passphrase Verify the site keyfile passphrase: # confirm Enter the local keyfile passphrase: # (2) set passphrase Verify the local keyfile passphrase: # confirm Please enter your site passphrase: # (1) input passphrase Please enter your site passphrase: # (1) input passphrase [root@www ~]# cd /etc/tripwire [root@www tripwire]# vi twcfg.txt # line 9: change LOOSEDIRECTORYCHECKING = true # line 12: change REPORTLEVEL = 4 [root@www tripwire]# twadmin -m F -c tw.cfg -S site.key twcfg.txt Please enter your site passphrase: # (1) input passphrase Wrote configuration file: /etc/tripwire/tw.cfg # create Optimization script for policies [root@www tripwire]# vi twpolmake.pl
#!/usr/bin/perl # Tripwire Policy File customize tool # ---------------------------------------------------------------- # Copyright (C) 2003 Hiroaki Izumi # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # ---------------------------------------------------------------- # Usage: # perl twpolmake.pl {Pol file} # ---------------------------------------------------------------- # $POLFILE=$ARGV[0]; open(POL,"$POLFILE") or die "open error: $POLFILE" ; my($myhost,$thost) ; my($sharp,$tpath,$cond) ; my($INRULE) = 0 ; while (<POL>) { chomp; if (($thost) = /^HOSTNAME\s*=\s*(.*)\s*;/) { $myhost = `hostname` ; chomp($myhost) ; if ($thost ne $myhost) { $_="HOSTNAME=\"$myhost\";" ; } } elsif ( /^{/ ) { $INRULE=1 ; } elsif ( /^}/ ) { $INRULE=0 ; } elsif ($INRULE == 1 and ($sharp,$tpath,$cond) = /^(\s*\#?\s*)(\/\S+)\b(\s+->\s+.+)$/) { $ret = ($sharp =~ s/\#//g) ; if ($tpath eq '/sbin/e2fsadm' ) { $cond =~ s/;\s+(tune2fs.*)$/; \#$1/ ; } if (! -s $tpath) { $_ = "$sharp#$tpath$cond" if ($ret == 0) ; } else { $_ = "$sharp$tpath$cond" ; } } print "$_\n" ; } close(POL) ; [root@www tripwire]# perl twpolmake.pl twpol.txt > twpol.txt.new [root@www tripwire]# twadmin -m P -c tw.cfg -p tw.pol -S site.key twpol.txt.new Please enter your site passphrase: # pass-phrase Wrote policy file: /etc/tripwire/tw.pol [root@www tripwire]# tripwire -m i -s -c tw.cfg # create DB Please enter your local passphrase: # pass-phrase [root@www tripwire]# tripwire -m c -s -c tw.cfg # run checking Open Source Tripwire(R) 2.4.1 Integrity Check Report Report generated by: root Report created on: Wed 27 Apr 2011 09:47:32 PM JST Database last updated on: Never ====================================================== Report Summary: ====================================================== Host name: www.srv.world Host IP address: 10.0.0.31 Host ID: None Policy file used: /etc/tripwire/tw.pol Configuration file used: /etc/tripwire/tw.cfg Database file used: /var/lib/tripwire/www.srv.world.twd Command line used: tripwire -m c -s -c tw.cfg ====================================================== Rule Summary: ====================================================== ------------------------------------------------------- Section: Unix File System ------------------------------------------------------- Rule Name Severity Level Added Removed Modified --------- -------------- ----- ------- -------- Invariant Directories 66 0 0 0 Temporary directories 33 0 0 0 Tripwire Data Files 100 0 0 0 Critical devices 100 0 0 0 (/proc/kcore) User binaries 66 0 0 0 Tripwire Binaries 100 0 0 0 Libraries 66 0 0 0 Operating System Utilities 100 0 0 0 File System and Disk Administraton Programs 100 0 0 0 Kernel Administration Programs 100 0 0 0 Networking Programs 100 0 0 0 System Administration Programs 100 0 0 0 Hardware and Device Control Programs 100 0 0 0 System Information Programs 100 0 0 0 Application Information Programs 100 0 0 0 (/sbin/rtmon) Shell Related Programs 100 0 0 0 (/sbin/getkey) Critical Utility Sym-Links 100 0 0 0 Shell Binaries 100 0 0 0 Critical system boot files 100 0 0 0 System boot changes 100 0 0 0 OS executables and libraries 100 0 0 0 Critical configuration files 100 0 0 0 Security Control 100 0 0 0 Login Scripts 100 0 0 0 Root config files 100 0 0 0 Total objects scanned: 14589 Total violations found: 0 ====================================================== Object Summary: ====================================================== ------------------------------------------------------- # Section: Unix File System ------------------------------------------------------- No violations. ====================================================== Error Report: ====================================================== No Errors ------------------------------------------------------- *** End of report *** Open Source Tripwire 2.4 Portions copyright 2000 Tripwire, Inc. Tripwire is a registered trademark of Tripwire, Inc. This software comes with ABSOLUTELY NO WARRANTY; for details use --version. This is free software which may be redistributed or modified only under certain conditions; see COPYING for details. All rights reserved. |
| [2] | Add a new file and Try to check again. |
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[root@www ~]# touch test.txt [root@www ~]# tripwire -m c -s -c /etc/tripwire/tw.cfg Open Source Tripwire(R) 2.4.1 Integrity Check Report Report generated by: root Report created on: Wed 27 Apr 2011 09:47:32 PM JST Database last updated on: Never ====================================================== Report Summary: ====================================================== Host name: www.srv.world Host IP address: 10.0.0.31 Host ID: None Policy file used: /etc/tripwire/tw.pol Configuration file used: /etc/tripwire/tw.cfg Database file used: /var/lib/tripwire/www.srv.world.twd Command line used: tripwire -m c -s -c tw.cfg ====================================================== Rule Summary: ====================================================== ------------------------------------------------------- Section: Unix File System ------------------------------------------------------- Rule Name Severity Level Added Removed Modified --------- -------------- ----- ------- -------- Invariant Directories 66 0 0 0 Temporary directories 33 0 0 0 Tripwire Data Files 100 0 0 0 Critical devices 100 0 0 0 (/proc/kcore) User binaries 66 0 0 0 Tripwire Binaries 100 0 0 0 Libraries 66 0 0 0 Operating System Utilities 100 0 0 0 File System and Disk Administraton Programs 100 0 0 0 Kernel Administration Programs 100 0 0 0 Networking Programs 100 0 0 0 System Administration Programs 100 0 0 0 Hardware and Device Control Programs 100 0 0 0 System Information Programs 100 0 0 0 Application Information Programs 100 0 0 0 (/sbin/rtmon) Shell Related Programs 100 0 0 0 (/sbin/getkey) Critical Utility Sym-Links 100 0 0 0 Shell Binaries 100 0 0 0 Critical system boot files 100 0 0 0 System boot changes 100 0 0 0 OS executables and libraries 100 0 0 0 Critical configuration files 100 0 0 0 Security Control 100 0 0 0 Login Scripts 100 0 0 0 * Root config files 100 1 0 0 Total objects scanned: 14590 Total violations found: 1 ====================================================== Object Summary: ====================================================== ------------------------------------------------------- # Section: Unix File System ------------------------------------------------------- ------------------------------------------------------- Rule Name: Root config files (/root) Severity Level: 100 ------------------------------------------------------- Added: "/root/test.txt" # detected ====================================================== Error Report: ====================================================== No Errors ------------------------------------------------------- *** End of report *** Open Source Tripwire 2.4 Portions copyright 2000 Tripwire, Inc. Tripwire is a registered trademark of Tripwire, Inc. This software comes with ABSOLUTELY NO WARRANTY; for details use --version. This is free software which may be redistributed or modified only under certain conditions; see COPYING for details. All rights reserved. # update the database if detected files are no ploblem in order not to be detected again. [root@www ~]# tripwire -m u -r /var/lib/tripwire/report/www.srv.world-20110427-170215.twr # save and quit Please enter your local passphrase: # pass-phrase Wrote database file: /var/lib/tripwire/www.srv.world.twd |