alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Backdoor.Specfix Checkin"; flow:established,to_server; content:"/AWS"; http_uri; content:".jsp?"; http_uri; content:"x-bigfix-client-string|3A|"; http_header; reference:url,us.norton.com/security_response/writeup.jsp?docid=2011-062203-3150-99&tabid=2; classtype:trojan-activity; sid:2013218; rev:2; metadata:created_at 2011_07_06, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)