alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Alexa Spyware Reporting URL"; flow:established,to_server; http.uri; content:"/image_server.cgi?size=small&url=http|3a|/"; nocase; classtype:pup-activity; sid:2002349; rev:9; metadata:created_at 2010_07_30, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_19;)