alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Neutrino Checkin 2"; flow:established,to_server; http.method; content:"POST"; http.request_body; bsize:6; content:"auth=1"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,25bd222c947fcbb7e1fb9f6e176ea53f; reference:url,securitykitten.github.io/an-evening-with-n3utrino/; classtype:command-and-control; sid:2022462; rev:7; metadata:created_at 2016_01_27, malware_family Win32_Neutrino, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_30;)