alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"MALWARE [PTsecurity] GandCrab v.5 SSL Connection"; flow:established, to_server; content:"|1703 01 0340|"; depth:5; stream_size:server, <,3923; stream_size:client, <,2001; flowbits:isset, FB709724_; flowbits:unset, FB709724_; flowbits:set, FB709724_0; flowbits:noalert; classtype:trojan-activity; metadata:created_at 2018_10_11; reference:url, github.com/ptresearch/AttackDetection; sid:11003916; rev:2;)