alert dns $HOME_NET any -> any any (msg:"ET MALWARE Chanitor .onion Proxy Domain"; dns_query; content:"brk7tda32wtkxjpa"; depth:16; nocase; fast_pattern; reference:md5,34ad24860495397c994f8ae168d0e639; classtype:trojan-activity; sid:2020581; rev:3; metadata:created_at 2015_02_27, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_30;)