Snort mailing list archives
RE: I'm being attacked, now what?
From: "Sheahan, Paul (PCLN-NW)" <Paul.Sheahan () priceline com>
Date: Sat, 16 Jun 2001 02:53:49 -0400
Thanks to all for their input on this. I have obtained some great information on this subject now! I have seen mention of a script several times now that allows us IDS guys to automatically lookup the email of the technical contact of an ISP when a large attack occurs and send out an automated email. Can anyone post an example of such a script? It would be nice to be able to automatically email info to an ISP when an attack/probe occurs on a large scale. It is very time consuming to send out manual emails to a dozen ISPs everyday! Thanks again! -----Original Message----- From: Tremaine Lea To: Bob Staaf; Sheahan, Paul (PCLN-NW); Snort-users () lists sourceforge net Sent: 6/16/01 2:02 AM Subject: Re: [Snort-users] I'm being attacked, now what? I think I might be able to shed some unique insight into this one, although I have to say Bob has the right of it. I work in the AUP department of one the larger ISP's in North America. Ideally what we like to see is a time/date stamped log that shows the attacking IP address, along with source and destination port. Big hint... don't submit multiple IP's in one complaint. It makes our job harder. And if you really want to win our attention, have a short description of the problem in the subject. Your's may not be the only attack to be reported regarding that IP, and we love it when we can group them <g> ie Subject : IP address/ tcp portscan Or something along those lines. Oh yeah, and don't swear at us. We eventually have to contact the 'offender' and we take enough abuse from them! A great many of the complaints we recieve turn out to be as a result of a compromised machine being used as a zombie. So please don't assume that the IP attacking you is the genuine source of the attack. At the very least you are helping secure one more machine on the internet, thereby closing it off to a hacker or s'kiddie. About the only other thing I can suggest is do a bit of research before you submit the info to us. You can't imagine how frustrating it is to recieve a blistering letter from someone demanding we 'take down and eliminate' a user because they had the audacity to ping someones machine... once. Weigh the severity of the attack and report accordingly. A couple of 'icmp unreachables' do not an attack make ;) On Friday 15 June 2001 17:00, Bob Staaf wrote:
Paul, The technical contact should but good and most ISPs have an email address similar to abuse () domain com or webmaster () domain com or visit
the
ISP website and check to see how to report network abuse, most have
that
info on their site. I usually attach the corresponding parts of the
log
with my IP anonymousified so they can see the details of the attack. Bob ----- Original Message ----- From: "Sheahan, Paul (PCLN-NW)" <Paul.Sheahan () priceline com> To: "'Bob Staaf '" <rstaaf () cfl rr com>; "Sheahan, Paul (PCLN-NW)" <Paul.Sheahan () priceline com>; <Snort-users () lists sourceforge net> Sent: Friday, June 15, 2001 6:47 PM Subject: RE: [Snort-users] I'm being attacked, now what?I agree with you Bob....I have a LOT of other things I need to be
doing
rather than whining to ISPs all day. Typically, where are complaints sent, to the technical contact who owns the address space or "security () isp com"orsomething similar? Would it be a good idea to include sniffer traces
with
the complaint? What info is best to send over? Thanks again! -----Original Message----- From: Bob Staaf To: Sheahan, Paul (PCLN-NW); Snort-users () lists sourceforge net Sent: 6/15/01 4:05 PM Subject: Re: [Snort-users] I'm being attacked, now what? Paul, I started out in the beginning whining to every ISP I could
track
down. You would have to hire a person full time do that if that is what
you
wanted to do. I typically whine if they scan more than a 3 or 4 ports on
any
one server at once. I also whine if they do certain types of scans that
a
typical script kiddie wouldn't be running. You might also want to complain if you see the same IP hitting your server day after day after day
even
if they only do one scan once a day, they may be trying to be inconspicuous, hoping you will miss them. Just some of the things to think about.
You
might want to look at something to help manage the logs like Acid or some other product, it will make the job much easier to spot trends. You know your management better than anyone but, the BEST
security
measure you can take is knowing what is going on with your network
and
keeping a close eye on the logs is one of the best ways to do that. Hope this helps Bob Staaf Southern Web Services Orlando, Fl ----- Original Message ----- From: "Sheahan, Paul (PCLN-NW)" <Paul.Sheahan () priceline com> To: <Snort-users () lists sourceforge net> Sent: Friday, June 15, 2001 3:12 PM Subject: [Snort-users] I'm being attacked, now what?I wanted to get some feedback from others out there on how they
handle
attacks, whether successful or unsuccessful. I see what appears to
be
validattacks in small numbers from random machines. Occasionally, I seetons ofdifferent attacks coming from ONE machine. Though all attacks are unsuccessful, when does someone scream to the ISP to tell them to
stop
theirclient, and when does one just ignore it? It would obviously be VERY time consuming (and a waste of time) tosendcomplaints to every ISP. What do people recommend out
there....maybe
onlysend a complaint when attacks from one node become ridiculously
large,
or ifthey successfully break in? The logs are nice to have, but I know management will ask what are
we
doingabout the attacks we are seeing and what is the time you are
spending
maintaining the IDS server doing for the company? Thanks _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: http://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users_______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: http://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
-- Tremaine Lea Doing things the hard way. Every time. _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: http://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- I'm being attacked, now what? Sheahan, Paul (PCLN-NW) (Jun 15)
- Re: I'm being attacked, now what? Paulie (Jun 15)
- Re: I'm being attacked, now what? Bob Staaf (Jun 15)
- <Possible follow-ups>
- RE: I'm being attacked, now what? Sheahan, Paul (PCLN-NW) (Jun 15)
- Re: I'm being attacked, now what? Bob Staaf (Jun 15)
- Re: I'm being attacked, now what? Tremaine Lea (Jun 15)
- Re: I'm being attacked, now what? Bob Staaf (Jun 15)
- RE: I'm being attacked, now what? Sheahan, Paul (PCLN-NW) (Jun 15)
- RE: I'm being attacked, now what? Ryan Russell (Jun 18)