alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"MALWARE [PTsecurity] Backdoor.Java.Adwind.cu pkt Checker flowbit set 4"; flow:established, to_server; content:"|1703|"; depth:2; byte_test:2, >=,900, 1, relative; byte_test:2, <=,1100, 1, relative; stream_size:server, >,1758; stream_size:server, <,2124; stream_size:client, >,1376; stream_size:client, <,5922; flowbits:isset, FB332502_1; flowbits:unset, FB332502_1; flowbits:set, FB332502_2; flowbits:noalert; metadata:former_category TROJAN; reference:md5,56e42156a1676b34f5350c01e34875d1; classtype:trojan-activity; reference:url, github.com/ptresearch/AttackDetection; sid:11124754; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, deployment Perimeter, signature_severity Major, created_at 2017_09_21, malware_family Adwind, performance_impact Moderate, updated_at 2018_01_30;)