alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Crossrider Spyware Checkin"; flow:established,to_server; http.uri; content:"/updater/"; startswith; content:"/update.json?rnd="; distance:32; within:18; http.header_names; to_lowercase; content:!"|0d 0a|user-agent|0d 0a|"; classtype:pup-activity; sid:2017196; rev:8; metadata:created_at 2013_07_26, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_01;)