alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Neutrino Checkin"; flow:to_server,established; http.method; content:"POST"; http.request_body; content:"cmd="; content:"version="; content:"quality="; fast_pattern; content:"av="; http.header_names; content:!"Referer|0d 0a|"; reference:md5,bef57db893b54c5605d0e3e7d50d6d70; reference:md5,bf555378d935de805f39c2d2d965a888; reference:url,securitykitten.github.io/an-evening-with-n3utrino/; classtype:command-and-control; sid:2018580; rev:7; metadata:created_at 2014_06_18, malware_family Win32_Neutrino, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_09;)