[Snort-users] You caught them, what next?

Drew Stockman Drew.Stockman at ...8272...
Wed Apr 2 11:44:25 EST 2003


Depends on what they are doing.  If they are scanning or just poking around a bit I usually just throw them into my banned IPs group on the firewall and are done with them.  If it looks like a concentrated effort of some kind then I follow up with an email to their ISP.  I also tend to scan them back in an effort to get more info about them and in the hope they pick up on it.  Most hackers that get scanned by the person they are poking at will get the message that they are caught and will quickly move on.  Always be sure to include some logs though.  An email message with no logs will most likely just get dumped in the trash.  Usually an ISP won't bother replying to you so I wouldn't get my hopes up.  As a side note, when I am bored I spend some time trying to get in touch with admins of some of the servers that are infected with a worm and throwing traffic at me.  Usually I get no response from these either, but occasionally someone sends a thank you email and I feel like I did my little part to make the internet a better place.

Drew Stockman
Security Analyst
CIBMIS


-----Original Message-----
From: Tobias Rice [mailto:rice at ...7669...]
Sent: Wednesday, April 02, 2003 11:58 AM
To: 'snort-users'
Subject: [Snort-users] You caught them, what next?


 
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Good morning to you all!
I hope that this isn't getting too far off topic, but since we all have this wonderful IDS in place, I'm sure you too are finding lots of people doing things they shouldn't. Which brings me to my question, what now?
Other than blocking them at the router, what action should be taken? I often email the isp's technical contact telling them what I found and for them to put an end to it. But is this useful? I've never gotten an email back, and I've sent plenty, which leads me to believe that no action has been taken, it went to the wrong person, or my email (which are pretty curt, see example) has offended the RP and was discarded. What are you all doing about your alerts?

[example email.]

To Whom It May Concern:
One of your customers, 216.243.8.18 (host18.fastdial.net), made 69 attempts to fingerprint my network via NMAP on 2003-04-02 03:43:39 Pacific. Please see to it that this stops immediately. Thank you for your cooperation.

[/example email...]

Thanks in advance!

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