> On Tuesday 23 October 2007 23:16:47 Jordi Prats wrote:
> > But it does check for some listening ports. There is not a
> better tool
> > for that?
> >
> > Maybe a combination of chkrootkit -d with some AV? Any
> recomendation?
> >
>
> Secondly, you do not need for chkrootkit to do that, just
> netstat -putan | grep -i listen will do the trick. In fact, I
> have set up a small script which run that every hour and send
> an email with the results to my account, I'm a wee paranoic,
> I know, but... :-)
>
Jordi, one of the tools I use is a small pearl script (see below) that collects data in various ways and creates text files from them in whatever directory you want. I then use a shell script that diffs the output of that script with the output from an hour ago with:
diff -a -b -B -p -r -u /home/backup/files /data/
After that output is mailed to me (only if there is a difference) I move the files I just created over to the directory I check against the next time I run the script:
echo "Backing up config files..." >> /home/mike/backup-ids.log
rsync -a --delete /data/* /home/backup/files >> /home/mike/backup-ids.log 2>> /home/mike/backup-ids.err
echo "" >> /home/mike/backup-ids.log
This allows you to use root kit hunters (ckrootkit & rkhunter) as well as simple tools like the listen script Manuel uses....
+++++++++++++++++++++++++++++++++
#!/usr/bin/perl -w
use strict;
my %Cmds;
my $host = qw(MyHostName);
my $user = "root";
chdir "/data";
my @md5files = qw(/bin/login
/usr/bin/passwd
/bin/ps);
my ($Second, $Minute, $Hour, $Day, $Month, $Year, $WeekDay, $DayOfYear, $IsDST) = localtime(time);
if ($Hour == 8) {
$Cmds{'disk.usage'} = "df -lk";
}
$Cmds{'md5sigs'} = "md5sum @md5files";
$Cmds{'suidfiles'} = "find / -type f -perm +6000 |xargs ls -l";
$Cmds{'cron.root'} = "crontab -l -u root";
#$Cmds{'chkroot'} = "/usr/bin/chkrootkit";
$Cmds{'/dev/null'} = "/usr/local/bin/rkhunter --update";
$Cmds{'rootkithunt'} = "/usr/local/bin/rkhunter -c --noappend-log --sk --nocolors";
$Cmds{'iptables'} = "/sbin/iptables --list";
$Cmds{'listening'} = "netstat -putan | grep -i listen";
### main loop ###
for my $file (keys %Cmds) {
my $cmd = $Cmds{$file};
### run each command on $host and print the
### output to $file
&run_command($cmd, $file, $host);
}
exit 0;
sub run_command() {
my ($cmd, $file, $host) = @_;
my ($stdout, $stderr, $exit) = system($cmd." > $file");
return;
}
++++++++++++++++++++++++++++++++++
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.503 / Virus Database: 269.15.6/1086 - Release Date: 10/22/2007 7:57 PM
