alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Neutrino ping"; flow:to_server,established; threshold:type both, count 1, seconds 60, track by_src; http.method; content:"POST"; http.header; content:"Content-Length|3a 20|7|0d 0a|"; nocase; http.request_body; content:"ping=1|0a|"; depth:7; fast_pattern; http.header_names; content:!"Accept"; content:!"Referer|0d 0a|"; reference:md5,bef57db893b54c5605d0e3e7d50d6d70; reference:md5,bf555378d935de805f39c2d2d965a888; reference:url,securitykitten.github.io/an-evening-with-n3utrino/; classtype:trojan-activity; sid:2019211; rev:5; metadata:created_at 2014_09_22, malware_family Win32_Neutrino, signature_severity Major, updated_at 2020_08_04;)