alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Vundo HTTP Pre-Install Checkin"; flow:established,to_server; http.uri; content:"/app/preinstall.php?"; fast_pattern; nocase; content:"t_uid="; nocase; content:"&t_pid="; nocase; content:"&t_mac="; nocase; classtype:command-and-control; sid:2007989; rev:4; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2024_03_10;)