I would use fast_pattern:only;
On Mon, Apr 22, 2013 at 3:21 PM, James Lay <jlay () slave-tothe-box net
Saw this a while ago..thought Id sig it up:
alert tcp $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS
content:"User-Agent|3A| <script>"; http_header; fast_pattern;
classtype:web-application-attack; sid:10000048; rev:1;)
As always, any advice that would make my sigs suck less would help
Thanks...and happy Monday (queue groans).