alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"MALWARE [PTsecurity] TorrentLocker pkt checker #3"; flow:established, to_client; content:"|1703|"; depth:2; byte_test:2, =,24, 1, relative; stream_size:server, <,3116; stream_size:client, <,2089; flowbits:noalert; flowbits:isset, FB90331_2; flowbits:unset, FB90331_2; flowbits:set, FB90331_3; classtype:trojan-activity; metadata:created_at 2017_7_14; reference:url, github.com/ptresearch/AttackDetection; sid:11001538; rev:1;)