alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING GENERIC SUSPICIOUS POST to Dotted Quad with Fake Browser 2"; flow:established,to_server; http.method; content:"POST"; http.user_agent; content:"|20|Firefox/"; nocase; fast_pattern; http.host; pcre:"/^(?:\d{1,3}\.){3}\d{1,3}/"; http.header_names; content:"|0d 0a|Host|0d 0a|"; depth:8; content:!"Accept-Encoding"; content:!"Referer"; content:!"X-Requested-With"; nocase; classtype:bad-unknown; sid:2018359; rev:5; metadata:created_at 2014_04_04, performance_impact Significant, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_06;)