alert dns $HOME_NET any -> any any (msg:"ET MALWARE TA453 Related Domain in DNS Lookup"; dns.query; bsize:22; content:"defaultbluemarker.info"; nocase; reference:url,www.volexity.com/blog/2024/02/13/charmingcypress-innovating-persistence/; classtype:domain-c2; sid:2052406; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_10_17, deployment Perimeter, malware_family TA453, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_06, reviewed_at 2024_03_18, former_sid 2855365;)