alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE OSX/WireLurker CnC Beacon"; flow:established,to_server; flowbits:set,ET.WireLurkerUA; http.method; content:"GET"; http.uri; content:"/getversion.php?sn="; fast_pattern; http.header_names; content:!"Accept|0d 0a|"; 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:2019662; rev:5; metadata:attack_target Client_Endpoint, created_at 2014_11_06, deployment Perimeter, malware_family OSX_WireLurker, signature_severity Major, tag c2, updated_at 2020_09_28, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)