alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed DNS Query to Blackrota Domain"; dns.query; content:"blackrato.ga"; nocase; bsize:12; reference:url,blog.netlab.360.com/blackrota-an-obfuscated-backdoor-written-in-go-en/; classtype:domain-c2; sid:2031234; rev:2; metadata:attack_target Client_Endpoint, created_at 2020_11_25, deployment Perimeter, malware_family Blackrota, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_12_03;)