alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Generic gate .php GET with minimal headers"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/gate.php"; nocase; fast_pattern; http.header_names; content:!"Referer"; content:!"Accept"; reference:md5,ad4045887298439f5a21700bdbc7a311; classtype:trojan-activity; sid:2022818; rev:4; metadata:created_at 2016_05_18, confidence Medium, signature_severity Major, updated_at 2020_08_18;)