alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious GET To gate.php with no Referer"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/gate.php"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; classtype:bad-unknown; sid:2030802; rev:2; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2020_08_27, deployment Perimeter, confidence Medium, signature_severity Informational, updated_at 2024_04_20;)