alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY HTTP Request to a *.cu.cc domain"; flow:established,to_server; http.host; content:".cu.cc"; pcre:"/^(?:\x3a\d{1,5})?$/R"; classtype:bad-unknown; sid:2013170; rev:6; metadata:created_at 2011_07_02, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_18;)