alert dns $HOME_NET any -> any any (msg:"ET MALWARE Scieron DNS Lookup (demon.4irc.com)"; dns.query; content:"demon.4irc.com"; depth:14; nocase; endswith; fast_pattern; reference:url,symantec.com/connect/blogs/scarab-attackers-took-aim-select-russian-targets-2012; classtype:trojan-activity; sid:2020250; rev:5; metadata:created_at 2015_01_23, confidence Medium, signature_severity Major, updated_at 2020_09_17;)