alert http $HOME_NET any -> $EXTERNAL_NET 30003 (msg:"ET INFO Observed Initial New Kind of Network (NKN) POST Request"; flow:established,to_server; http.request_line; content:"POST|20|/|20|HTTP/1.1"; http.host.raw; content:"seed.nkn.org|3a|"; startswith; fast_pattern; http.user_agent; content:"Go-http-client/"; startswith; http.request_body; content:"{|22|id|22 3a 22|"; reference:md5,aedebba95462e9db10b834551e3abc03; reference:url,nkn.org; classtype:misc-activity; sid:2034414; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_11_10, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Web3, updated_at 2023_05_02;)