alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Crossrider Spyware Checkin"; flow:established,to_server; http.uri; content:"/updater/"; depth:9; content:"/update.json?rnd="; distance:32; within:18; http.header_names; content:!"User-Agent"; classtype:pup-activity; sid:2017196; rev:6; metadata:created_at 2013_07_26, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_31;)