alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"SUSPICIOUS [PTsecurity] Unusual TOR SSL Activity FB set FB447357_3"; flow:established, to_client; content:"|1703 01 0020|"; depth:5; fast_pattern; content:"|1703|"; distance:32; within:2; stream_size:server, >,3630; stream_size:server, <,3963; stream_size:client, >,1264; stream_size:client, <,2558; flowbits:noalert; flowbits:isset, FB447357_2; flowbits:unset, FB447357_2; flowbits:set, FB447357_3; reference:url, rules.ptsecurity.com; classtype:misc-activity; sid:11002433; rev:6;)