alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed Malicious DNS Query (Mirrorthief Group)"; dns.query; content:"cloudmetric-analytics.com"; depth:25; nocase; endswith; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/mirrorthief-group-uses-magecart-skimming-attack-to-hit-hundreds-of-campus-online-stores-in-us-and-canada; classtype:trojan-activity; sid:2027321; rev:4; metadata:attack_target Client_Endpoint, created_at 2019_05_06, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17;)