alert tcp any any -> any any (msg:"REMOTE [PTsecurity] Possible CyberGate Request"; flow:established, to_server; stream_size:server, <, 3; stream_size:client, =, 5; dsize:4; content:"|7c 0a|"; offset:2; depth:2; fast_pattern; pcre:"/^[2-4]{1}[0-9]{1}\x7c\x0a/"; threshold:type limit,track by_src,count 1,seconds 120; flowbits:set, CyberGate_rqs0; reference:url, https://www.virustotal.com/gui/file/289c546bff97b1f1c08c5bb2d58ec8073e4fdb3cb5e75215e0b9eaf18e8eb866/; reference:url, rules.ptsecurity.com; classtype:trojan-activity; sid:10010929; rev:2;)