alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Theoreon.com Related Trojan Checkin"; flow:established,to_server; http.uri; content:"/firststart.php?pid="; nocase; content:"&dt="; nocase; content:"&v="; nocase; classtype:command-and-control; sid:2007832; rev:5; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_02;)