alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"REMOTE [PTsecurity] RevengeRAT"; flow:established, to_server; stream_size:server, <, 3; stream_size:client, <, 600; content:"Information"; depth:11; pcre:"/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/R"; threshold:type limit, track by_src, seconds 120, count 1; reference:url, rules.ptsecurity.com; classtype:trojan-activity; sid:10006162; rev:7;)