alert dns $HOME_NET any -> any any (msg:"ET MALWARE Observed DNS Query to Winnti Domain"; dns.query; dotprefix; content:".host.skybad.top"; nocase; endswith; reference:md5,c99397d66e49e2def1b17f57cd0c5fb9; classtype:trojan-activity; sid:2035877; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_08, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_01;)