alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Possible MSXMLHTTP Request to Dotted Quad"; flow:to_server,established; flowbits:set,et.MS.XMLHTTP.ip.request; flowbits:noalert; http.start; content:"HTTP/1.1|0d 0a|Accept|3a 20|*/*|0d 0a|Accept-Encoding|3a 20|gzip, deflate|0d 0a|User-Agent|3a 20|Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT"; fast_pattern; http.header_names; content:!"UA-CPU"; content:!"Cookie"; content:!"Referer"; content:!"Accept-Language"; http.host; pcre:"/^(?:\d{1,3}\.){3}\d{1,3}/"; classtype:misc-activity; sid:2022054; rev:6; metadata:created_at 2015_11_10, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17;)