alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"POLICY [PTsecurity] TOR SSL connection"; flow:established, to_server; content:"|1703|"; depth:2; byte_test:2, >=,538, 1, relative; byte_test:2, <=,4072, 1, relative; stream_size:server, <,40000; stream_size:client, <,40000; stream_size:server, >,0; stream_size:client, >,0; flowbits:isset, FB0_3; flowbits:unset, FB0_3; classtype:misc-activity; metadata:created_at 2017_7_6; reference:url, github.com/ptresearch/AttackDetection; sid:11001464; rev:3;)