alert tcp $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET MALWARE Possible OceanLotus CnC Heartbeat"; flow:to_client,established; dsize:14; content:"|75 7a 76 7e 1a 1b 1b 1b 1b 1b 11 1b 1b 1b|"; fast_pattern; threshold:type limit, count 1, track by_src, seconds 60; reference:url,www.alienvault.com/open-threat-exchange/blog/oceanlotus-for-os-x-an-application-bundle-pretending-to-be-an-adobe-flash-update; classtype:command-and-control; sid:2022540; rev:1; metadata:created_at 2016_02_18, confidence Medium, signature_severity Major, updated_at 2019_07_26;)