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Re: PCRE and uricontent anchor


From: L0rd Ch0de1m0rt <l0rdch0de1m0rt () gmail com>
Date: Fri, 26 Mar 2010 13:41:45 -0500

Homework! Yah!

Joel is correct you could also add 'content:"POST"; http_method;' to
only match on POST events,

Cheers,

-L0rd Ch0de1m0rt

On 3/26/10, Joel Esler <joel.esler () me com> wrote:
Using your below example:

On Mar 26, 2010, at 2:18 PM, Curt Shaffer wrote:

I am attempting to write a rule that would capture a POST event to a url
with a specific file. Here is an example:

https://www.example.com/abc.aspx?id=459184950

The id section is always different. We also want to look for any similar
POSTS to any address. With that in mind, here is the basis of what we came
up with.

alert tcp $HOME_NET any -> $EXTERNAL_NET 443 (msg:"Bad stuff potentially
going on unencrypted"; uricontent:"aspx?id="; pcre:"/aspx\?id=\d*/U";
classtype:trojan-activity; sid:x; rev:1;)


--
Joel Esler
http://blog.joelesler.net



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Download Intel&#174; Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
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