alert dns $HOME_NET any -> any any (msg:"ET MALWARE TA427 Related Domain in DNS Lookup (cf-health .click)"; dns.query; dotprefix; content:".cf-health.click"; nocase; endswith; reference:url,twitter.com/h2jazi/status/1658133904618934272; reference:url,twitter.com/500mk500/status/1658212897414062090; classtype:domain-c2; sid:2045804; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_05_22, deployment Perimeter, deprecation_reason Age, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_22, reviewed_at 2023_08_22;)