alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Ozone/Darktrack RAT Variant - Client Hello (set)"; flow:established,to_server; flowbits:noalert; flowbits:set,ET.OzoneRAT; content:"|2c ef 3a e7 89 fe 48 af ac f8|"; depth:10; dsize:110<>113; reference:md5,583de02ec747f0316fb7b0e59bd858bd; classtype:trojan-activity; sid:2032542; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_04_08, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_08;)