alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SERVER WeBaCoo Web Backdoor Detected"; flow:to_server,established; http.method; content:"GET"; http.cookie; content:"cm="; content:"cn=M-cookie|3b|"; fast_pattern; content:"cp="; reference:url,panagioto.com/webacoo-backdoor-detection; classtype:web-application-activity; sid:2022295; rev:5; metadata:created_at 2015_12_22, signature_severity Major, updated_at 2020_11_05;)