alert dns $HOME_NET any -> any any (msg:"ET MALWARE Sofacy DNS Lookup malwarecheck.info"; dns.query; content:"malwarecheck.info"; depth:17; fast_pattern; nocase; endswith; reference:url,www.symantec.com/security_response/writeup.jsp?docid=2014-110315-1233-99&tabid=2; classtype:targeted-activity; sid:2019640; rev:5; metadata:created_at 2014_11_04, confidence Medium, signature_severity Major, updated_at 2020_09_17;)