alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Storm Worm HTTP Request"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?"; fast_pattern; pcre:"/^\/\?[0-9a-f]{16}/i"; http.host; pcre:"/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}/i"; classtype:trojan-activity; sid:2006411; rev:10; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_15;)