alert dns $HOME_NET any -> any any (msg:"ET MALWARE APT SideWinder CnC Domain in DNS Lookup (cdn-in. net)"; dns.query; content:"cdn-in.net"; nocase; endswith; reference:url,mp.weixin.qq.com/s/Kkta59k7r81uIBjJvE9pCw; reference:url,blog.group-ib.com/sidewinder-antibot; classtype:targeted-activity; sid:2036746; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_04_24, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag APT, tag Sidewinder, updated_at 2020_09_17;)