Snort mailing list archives
Re: Couple sigs
From: James Lay <jlay () slave-tothe-box net>
Date: Mon, 10 Sep 2012 08:22:27 -0600
On 2012-09-10 07:52, Alex Kirk wrote:
With, that is, some tweaks to be slightly less specific. If you can be evaded by simply switching the order of the width and height on the first one, for example, well, youre probably less than useful.
Thanks Alex. For the hidden iframe, I'm thinking maybe something like the below: alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"INDICATOR-COMPROMISE Hidden iframe"; flow:to_client, established; file_data; content:"<iframe"; content:"width="; content:"height="; pcre:"/=[0-1]/ms"; content:"style=visibility|3a|hidden"; classtype:bad-unknown; sid:10000023; rev:2;) I was thinking a byte_test that will test to see if width= or height= are less than say 2, but I haven't yet figured out how to get that to fly, so I guess the pcre will suffice for now. This alerts on my packet cap, and so far no FP's running live. You think some within statements might help? Thanks Alex. James ------------------------------------------------------------------------------ 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:
- Couple sigs James Lay (Sep 07)
- Re: Couple sigs Alex Kirk (Sep 10)
- Re: Couple sigs Alex Kirk (Sep 10)
- Re: Couple sigs James Lay (Sep 10)
- Re: Couple sigs Alex Kirk (Sep 10)
- Re: Couple sigs James Lay (Sep 10)
- Re: Couple sigs lists () packetmail net (Sep 10)
- Re: Couple sigs Alex Kirk (Sep 10)
- Re: Couple sigs lists () packetmail net (Sep 10)
- Re: Couple sigs Alex Kirk (Sep 10)
- Re: Couple sigs Alex Kirk (Sep 10)