alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"MALWARE [PTsecurity] RevCode SSL connection pkt checker #2"; flow:established, to_client; content:"|1703|"; depth:2; content:"|0180|"; distance:1; within:2; fast_pattern; stream_size:server, >,1599; stream_size:server, <,7014; stream_size:client, >,646; stream_size:client, <,1560; flowbits:isset, FB375151_1; flowbits:unset, FB375151_1; flowbits:set, FB375151_2; classtype:trojan-activity; metadata:created_at 2017_10_27; reference:url, github.com/ptresearch/AttackDetection; sid:11002167; rev:1;)