alert tcp any any -> any any (msg:"STEALER [PTsecurity] WorldWind Checkin"; flow:established, to_server; stream_size:client, <, 80; stream_size:server, <, 3; content:"|46 00 00 00|"; startswith; fast_pattern; content:"{|22|id|22 3a| 0"; within:8; content:"|22|hwid|22 3a|"; within:10; content:!"|20|"; distance:2; within:32; content:"|22|country|22 3a|"; distance:32; content:!","; distance:0; reference:url, rules.ptsecurity.com; classtype:trojan-activity; sid:10012099; rev:2;)