Firewall Wizards: Re: New Script Kiddie tool ?

[Jim MacLeod <jmacleod () hotpop com>]

Hello Peter,

ICMP type 8 is ping.
UDP 53 is DNS.

If it is a tool, there's nothing very exciting about it.  3 pings followed 
by 2 DNS, repeat.
It'd be interesting to get a capture of the traffic to see whether it's 
queries or replies.
If the 61 addresses are all the same, this is most likely someone trying to 
DoS that device, possibly doing a modified smurf/DDoS to try to suck up 
your bandwidth.  There's a detailed write-up of this sort of attack at 
http://www.grc.com under "Direct Reflected DoS".
Are you sure it's not more frequent, and your log source (firewall?) is 
only reporting it every 10 seconds?
Regards,
-Jim MacLeod

At 04:00 PM 8/22/2002, Peter Robinson wrote:

> G/Day all
>
> Has any one seem this sort of probe ??
>
> It apears from all over the place and it seems to be spaced exactly 10
> seconds appart.
>
> I am assuming this is a tool of sorts..
>
>
> Source Address=208.184.139.82
>         Aug 22 14:04:21 Firewall 208.184.139.82 61.x.x.x----ICMP TYPE=8
>         Aug 22 14:04:31 Firewall 208.184.139.82 61.x.x.x----ICMP TYPE=8
>         Aug 22 14:04:41 Firewall 208.184.139.82 61.x.x.x----ICMP TYPE=8
>         Aug 22 14:04:51 Firewall 208.184.139.82 61.x.x.x----UDP 53
>         Aug 22 14:05:01 Firewall 208.184.139.82 61.x.x.x----UDP 53
>         Aug 22 17:00:03 Firewall 208.184.139.82 61.x.x.x----ICMP TYPE=8
>         Aug 22 17:00:13 Firewall 208.184.139.82 61.x.x.x----ICMP TYPE=8
>         Aug 22 17:00:23 Firewall 208.184.139.82 61.x.x.x----ICMP TYPE=8
>         Aug 22 17:00:33 Firewall 208.184.139.82 61.x.x.x----UDP 53
>         Aug 22 17:00:43 Firewall 208.184.139.82 61.x.x.x----UDP 53
>
> Source Address=208.185.54.14
>         Aug 22 14:04:21 Firewall 208.185.54.14 61.x.x.x----ICMP TYPE=8
>         Aug 22 14:04:32 Firewall 208.185.54.14 61.x.x.x----ICMP TYPE=8
>         Aug 22 14:04:42 Firewall 208.185.54.14 61.x.x.x----ICMP TYPE=8
>         Aug 22 14:04:52 Firewall 208.185.54.14 61.x.x.x----UDP 53
>         Aug 22 14:05:02 Firewall 208.185.54.14 61.x.x.x----UDP 53
>         Aug 22 15:53:32 Firewall 208.185.54.14 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:53:42 Firewall 208.185.54.14 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:53:52 Firewall 208.185.54.14 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:54:02 Firewall 208.185.54.14 61.x.x.x----UDP 53
>         Aug 22 15:54:12 Firewall 208.185.54.14 61.x.x.x----UDP 53
>         Aug 22 17:00:02 Firewall 208.185.54.14 61.x.x.x----ICMP TYPE=8
>         Aug 22 17:00:12 Firewall 208.185.54.14 61.x.x.x----ICMP TYPE=8
>         Aug 22 17:00:22 Firewall 208.185.54.14 61.x.x.x----ICMP TYPE=8
>         Aug 22 17:00:32 Firewall 208.185.54.14 61.x.x.x----UDP 53
>         Aug 22 17:00:42 Firewall 208.185.54.14 61.x.x.x----UDP 53
>
> Source Address=208.225.197.194
>         Aug 22 15:53:35 Firewall 208.225.197.194 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:53:45 Firewall 208.225.197.194 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:53:55 Firewall 208.225.197.194 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:54:05 Firewall 208.225.197.194 61.x.x.x----UDP 53
>         Aug 22 15:54:15 Firewall 208.225.197.194 61.x.x.x----UDP 53
>
> Source Address=208.254.18.130
>         Aug 22 15:53:31 Firewall 208.254.18.130 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:53:41 Firewall 208.254.18.130 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:53:51 Firewall 208.254.18.130 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:54:02 Firewall 208.254.18.130 61.x.x.x----UDP 53
>         Aug 22 15:54:11 Firewall 208.254.18.130 61.x.x.x----UDP 53
>
> Source Address=208.254.75.130
>         Aug 22 15:53:32 Firewall 208.254.75.130 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:53:42 Firewall 208.254.75.130 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:53:52 Firewall 208.254.75.130 61.x.x.x----ICMP TYPE=8
>         Aug 22 15:54:02 Firewall 208.254.75.130 61.x.x.x----UDP 53
>         Aug 22 15:54:12 Firewall 208.254.75.130 61.x.x.x----UDP
>
> Peter Robinson
> Senior Security Engineer - Sydney
> DeMorgan Information Security Specialists
> robinson_p () demorgan com au, www.demorgan.com.au,
> Tel.    1800 336 674
> Tel.    +61 2 9929-0377
> Fax     +61 2 9499 4885
>
>
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