alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"POLICY [PTsecurity] TOR SSL connection pkt checker #3"; flow:established, to_client; content:"|1703|"; depth:2; content:"|02 40|"; distance:1; within:2; fast_pattern; stream_size:server, <,40000; stream_size:client, <,40000; stream_size:server, >,0; stream_size:client, >,0; flowbits:isset, FB0_2; flowbits:unset, FB0_2; flowbits:set, FB0_3; flowbits:noalert; classtype:misc-activity; metadata:created_at 2017_7_6; reference:url, github.com/ptresearch/AttackDetection; sid:11001845; rev:3;)