alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ProxyBox - HTTP CnC - botinfo.php"; flow:established,to_server; http.uri; content:"/botinfo.php?"; http.header_names; to_lowercase; content:!"|0d 0a|user-agent|0d 0a|"; reference:url,www.symantec.com/security_response/writeup.jsp?docid=2012-071005-4515-99&tabid=2; classtype:command-and-control; sid:2015508; rev:4; metadata:created_at 2012_07_21, signature_severity Major, updated_at 2024_04_20;)