alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Small.zon checkin"; flow:established,to_server; http.method; content:"GET"; startswith; http.uri; content:"?n="; fast_pattern; content:"&id="; content:"&t="; content:"&i="; pcre:"/\?n=\d+&id=.+&t=.+&i=\d/i"; classtype:command-and-control; sid:2009300; rev:8; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2024_04_14;)