alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE OSX/Shlayer CnC Activity M1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?b9zd1="; fast_pattern; content:"&cid="; distance:0; content:"&sid="; distance:0; content:"&v_id="; distance:0; reference:url,www.carbonblack.com/2019/02/12/tau-threat-intelligence-notification-new-macos-malware-variant-of-shlayer-osx-discovered/; classtype:command-and-control; sid:2026910; rev:2; metadata:affected_product Mac_OSX, created_at 2019_02_14, deployment Perimeter, malware_family Shlayer, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_08_27;)