alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed DNS Query to VBS/Agent.PUK Domain"; dns.query; content:"cmaildowninvoice.webcindario.com"; fast_pattern; reference:url,hasec.ahnlab.com/ko/33141/; reference:md5,ab97956fec732676ecfcedf55efadcbc; reference:md5,e49e41a810730f4bf3d43178e4c84ee5; classtype:trojan-activity; sid:2035945; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_04_13, deployment Perimeter, deprecation_reason Age, malware_family VBS_Agent_PUK, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_21, reviewed_at 2023_08_21;)