alert dns $HOME_NET any -> any any (msg:"ET MALWARE TA453 Domain in DNS Lookup (oracle-java .cf)"; dns.query; content:"oracle-java.cf"; nocase; bsize:14; reference:url,www.microsoft.com/en-us/security/blog/2023/04/18/nation-state-threat-actor-mint-sandstorm-refines-tradecraft-to-attack-high-value-targets/; classtype:command-and-control; sid:2045201; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_04_25, deployment Perimeter, deprecation_reason Age, performance_impact Low, confidence High, signature_severity Major, tag TA453, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_25;)