alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Best-targeted-traffic.com Spyware Checkin"; flow:established,to_server; http.uri; content:"/checkin.php?"; nocase; content:"unq="; nocase; content:"version="; nocase; http.user_agent; content:"Opera|20|"; nocase; depth:6; classtype:pup-activity; sid:2003209; rev:9; metadata:created_at 2010_07_30, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_17;)