alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP OSX ADWARE/Mackeeper Checkin"; flow:established,to_server; http.uri; content:"/landings/"; depth:10; http.user_agent; content:"Macintosh|3b|"; http.host; content:"mackeeper"; startswith; http.cookie; content:"ldrBrowser=|25|22Safari|25|22|3b|"; content:"ldrOs=|25|22Mac+OS+X|25|22|3b|"; classtype:pup-activity; sid:2021548; rev:5; metadata:created_at 2015_07_29, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_31;)