alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Neutrino Checkin 3"; flow:to_server,established; http.method; content:"POST"; http.request_body; content:"exec=1&task_id="; depth:15; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; reference:md5,25bd222c947fcbb7e1fb9f6e176ea53f; reference:url,securitykitten.github.io/an-evening-with-n3utrino/; classtype:command-and-control; sid:2022463; rev:4; metadata:created_at 2016_01_27, malware_family Win32_Neutrino, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_04;)