alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE NetBackdoor Checkin"; flow:to_server,established; http.method; content:"POST"; http.uri; content:".php"; http.request_body; content:"|0d 0a|log="; fast_pattern; content:"path="; pcre:"/path=[A-Z]\x3a\x5c[A-F0-9]+\r\nlog=/i"; reference:md5,a6a9e8b0432ad557245ac8ad2926ed7c; classtype:command-and-control; sid:2022244; rev:3; metadata:created_at 2015_12_12, signature_severity Major, updated_at 2020_06_10;)