alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"MALWARE [PTsecurity] Trickbot/Dyre/Dridex #3"; flow:established, to_client; content:"|17 03 01 01 00|"; depth:5; content:"|17 03 01 00 20|"; distance:256; within:5; content:"|17 03 01|"; distance:32; within:3; stream_size:server, <,30000; stream_size:client, <,30000; flowbits:isset, FB320221_0; flowbits:unset, FB320221_0; flowbits:set, FB320221_1; classtype:trojan-activity; metadata:created_at 2017_8_11; reference:url, github.com/ptresearch/AttackDetection; sid:10001760; rev:1;)