alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING POST Request to .cfd Domain"; flow:established,to_server; http.method; content:"POST"; http.host; content:".cfd"; endswith; fast_pattern; http.header_names; content:!"|0d 0a|referer|0d 0a|"; nocase; classtype:misc-activity; sid:2065886; rev:1; metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_11_24, deployment Perimeter, deployment SSLDecrypt, performance_impact Significant, confidence Low, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_24; target:src_ip;)