alert tcp $EXTERNAL_NET [:32768] -> $HOME_NET any (msg:"ET MALWARE [PTsecurity] Backdoor.Java.Adwind.cu Certificate flowbit set 1"; flow:established, to_client; content:"|30 82 04|"; depth:300; content:"|30 82 03|"; distance:1; within:3; content:"|a0 03 02 01 02 02 04|"; distance:1; within:7; content:"|30 0d 06 09 2a 86 48 86 f7 0d 01 01 0b 05 00 30 81|"; distance:4; within:17; flowbits:set,FB332502_; flowbits:noalert; threshold:type limit, track by_src, count 1, seconds 30; reference:md5,d93dd17a9adf84ca2839708d603d3bd6; classtype:trojan-activity; sid:2024751; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_09_21, deployment Perimeter, malware_family Adwind, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2019_07_26;)