alert http any any -> any any (msg:"STEALER [PTsecurity] EncryptHub Checkin"; flow:established, to_server; http.method; content:"POST"; http.uri; content:"/?method=Callback"; endswith; http.header_names; content:"|0d 0a|Api-Key|0d 0a|"; startswith; content:!"Referer"; content:!"Accept"; http.content_type; content:"application/json"; startswith; http.request_body; content:"|7b 0d 0a|"; startswith; content:"|22|Message|22 3a|"; content:"|22|ExternalIP|22 3A|"; distance:0; fast_pattern; threshold:type limit, track by_dst, count 1, seconds 180; reference:url, trendmicro.com/en_us/research/25/c/deep-dive-into-water-gamayun.html; reference:url, www.joesandbox.com/analysis/1565464/0/html; reference:url, rules.ptsecurity.com; classtype:trojan-activity; sid:10012532; rev:2;)