alert dns $HOME_NET any -> any any (msg:"ET MALWARE Operation Cobra Venom Stage 1 DNS Lookup"; dns.query; content:"my-homework.890m.com"; nocase; fast_pattern; endswith; reference:url,blog.alyac.co.kr/2066; classtype:trojan-activity; sid:2026763; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_01_08, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Operation_Cobra_Venom, updated_at 2020_09_16;)