alert dns $HOME_NET any -> any any (msg:"ET MALWARE CustomRAT DNS lookup"; dns.query; content:"www729448908.f3322.org"; depth:22; fast_pattern; endswith; nocase; classtype:trojan-activity; sid:2022473; rev:5; metadata:created_at 2016_01_29, confidence High, signature_severity Major, updated_at 2020_09_17;)