alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Downloader Checkin Pattern Used by Several Trojans"; flow:established,to_server; content:".php?"; http_uri; content:"uid="; http_uri; content:"&gid="; http_uri; content:"&cid="; http_uri; content:"&rid="; http_uri; content:"&sid="; http_uri; classtype:trojan-activity; sid:2008143; rev:5; metadata:created_at 2010_07_30, signature_severity Unknown, updated_at 2019_07_26;)