alert dns $HOME_NET any -> any any (msg:"ET MALWARE Suspected Snugy DNS Backdoor CnC Activity (Hostname Send)"; dns.query; bsize:>22; content:"266"; offset:3; depth:8; pcre:"/^[zjr9x]{1}[tmdhpz]{1}[0-9a-z]{1,6}266(?:[a-zA-Z0-9]{1,6})?+\./"; content:!".trendmicro.com"; content:!"cnr.io"; endswith; reference:url,unit42.paloaltonetworks.com/xhunt-campaign-backdoors/; classtype:command-and-control; sid:2031194; rev:5; metadata:attack_target Client_Endpoint, created_at 2020_11_09, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_17;)