alert dns $HOME_NET any -> any any (msg:"ET MALWARE Lazarus Decafett DNS Lookup 3"; dns.query; content:"mozilla.tftpd.net"; depth:17; nocase; endswith; fast_pattern; reference:url,cdn.securelist.com/files/2017/10/Guerrero-Saade-Raiu-VB2017.pdf; classtype:trojan-activity; sid:2024805; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_10_05, deployment Perimeter, malware_family Decafett, performance_impact Low, confidence Medium, signature_severity Critical, tag APT, tag Lazarus, updated_at 2020_09_17;)