alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE OSX/WireLurker Checkin"; flow:established,to_server; flowbits:set,ET.WireLurkerUA; http.method; content:"GET"; http.uri; content:"/mac_log/?appid="; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; reference:url,paloaltonetworks.com/content/dam/paloaltonetworks-com/en_US/assets/pdf/reports/Unit_42/unit42-wirelurker.pdf; classtype:command-and-control; sid:2019661; rev:5; metadata:created_at 2014_11_06, malware_family OSX_WireLurker, signature_severity Major, updated_at 2020_09_28;)