alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Mac Flashback Checkin 3"; flow:to_server,established; content:"GET"; http_method; content:"/search?q="; http_uri; content:"&ua="; http_uri; distance:0; content:"==&al="; http_uri; distance:0; content:"&cv="; http_uri; distance:0; classtype:command-and-control; sid:2014599; rev:5; metadata:created_at 2012_04_17, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)