alert dns $HOME_NET any -> any any (msg:"ET MALWARE Mirai Botnet Domain Observed"; dns_query; content:"tro69.online"; depth:12; nocase; endswith; fast_pattern; reference:url,blog.netlab.360.com/new-mirai-variant-with-dga/; classtype:trojan-activity; sid:2023608; rev:4; metadata:attack_target Client_Endpoint, created_at 2016_12_12, deployment Perimeter, confidence High, signature_severity Major, updated_at 2019_09_28;)