alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE CBReplay Checkin"; flow:established,to_server; urilen:10; http.method; content:"POST"; http.uri; content:"/index.php"; http.header_names; content:!"Referer|0d 0a|"; content:!"User-Agent|0d 0a|"; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/"; http.request_body; content:"filename=|22|"; pcre:"/^\d+?\x22/R"; classtype:command-and-control; sid:2017264; rev:4; metadata:created_at 2013_08_01, performance_impact Significant, signature_severity Major, updated_at 2024_04_22;)