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| Subject: | Re: [Snort-sigs] new rule for detect iis DoS via ~ |
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| Date: | Mon, 19 Dec 2005 08:25:51 -0600 |
On Sun, 2005-12-18 at 10:46 +0100, rmkml wrote:
web-iis.rules:alert tcp $EXTERNAL_NET any -> $HOME_NET $HTTP_PORTS (msg:"WEB-IIS Dos ~ attempt"; flow:to_server,established; uricontent:"~"; pcre:"/~\d/"; classtype:web-application-activity; )
That will probably trigger a lot of false positives. (i.e. ...blogthis.php?id=~2234&user=me) How about uricontent:".dll"; pcre:"/~\d/U"; ? That was you at least confine FP's to any .dll based URLs. Regards, Frank -- It is said that the Internet is a public utility. As such, it is best compared to a sewer. A big, fat pipe with a bunch of crap sloshing against your ports.
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