Snort mailing list archives
Re: Understanding within
From: "lists () packetmail net" <lists () packetmail net>
Date: Wed, 15 Aug 2012 13:10:31 -0500
On 08/15/12 13:01, James Lay wrote:
Thanks gents...this does help. Not to beat a dead horse here...here's the original snippet from the email: The reference number for this fax is <a href="hxxp://pixeljunks.de/YRmJLNJv/index.html">min1_did12-1345023267-7176853217-25 For things like this should I just forget about the within statement, knowing that: content:"<a href=|22|http:"; fast_pattern; pcre:"/\x2f[a-z]{8}\x2f/i"; will only match a packet that contains the content AND the pcre? Again...just trying to tighten and optimize as best I can...thanks again.
On the ET side we've got a really good one for this, it's the 8-character camel-case to index.html check out sid 2014521. Basically, I'd do the below to re-create the urilen style seen with 2014521 and avoid being pcre-heavy/pcre-only and ensure the camel-case style they use. content:"/"; content:"/index.html|22|>"; within:21; fast_pattern; pcre:"/https?:\/\/[^\x2f]+\/[A-Za-z0-9]+[A-Z]+[A-Za-z0-9]*\/index\.html[^\w]?/"; Thanks, Nathan ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Snort-sigs mailing list Snort-sigs () lists sourceforge net https://lists.sourceforge.net/lists/listinfo/snort-sigs http://www.snort.org Please visit http://blog.snort.org for the latest news about Snort!
Current thread:
- Understanding within James Lay (Aug 15)
- Re: Understanding within lists () packetmail net (Aug 15)
- Re: Understanding within James Lay (Aug 15)
- Re: Understanding within Joel Esler (Aug 15)
- Re: Understanding within lists () packetmail net (Aug 15)
- Re: Understanding within James Lay (Aug 15)
- Re: Understanding within lists () packetmail net (Aug 15)
- Re: Understanding within Joel Esler (Aug 15)
- Re: Understanding within James Lay (Aug 15)
- Re: Understanding within James Lay (Aug 15)
- Re: Understanding within lists () packetmail net (Aug 15)