alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed DNS Query to Ursnif Domain (daydayvin .xyz)"; dns.query; content:"daydayvin.xyz"; nocase; bsize:13; reference:url,www.mandiant.com/resources/blog/rm3-ldr4-ursnif-banking-fraud; classtype:trojan-activity; sid:2039630; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_11_02, deployment Perimeter, deprecation_reason Age, malware_family ursnif, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_08_28, reviewed_at 2024_08_28;)