alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Necurs"; flow:to_server,established; http.method; content:"POST"; http.uri; content:"/iis/host.aspx"; fast_pattern; http.header_names; content:!"User-Agent|0d 0a|"; http.content_type; content:"application/octet-stream"; reference:md5,871ecf11ddd7ffe294cab82bcaf9c310; reference:url,blogs.technet.com/b/mmpc/archive/2012/12/06/unexpected-reboot-necurs.aspx; classtype:trojan-activity; sid:2016000; rev:3; metadata:created_at 2012_12_08, malware_family Win32_Necurs, signature_severity Major, updated_at 2020_04_22;)