alert dns $HOME_NET any -> any any (msg:"ET MALWARE APT28/Sednit DNS Lookup (advpdxapi .com)"; dns.query; content:"advpdxapi.com"; depth:13; nocase; endswith; fast_pattern; reference:url,www.welivesecurity.com/wp-content/uploads/2016/10/eset-sednit-part-2.pdf; classtype:targeted-activity; sid:2023410; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_10_25, deployment Perimeter, malware_family APT28_Sednit, confidence Medium, signature_severity Major, updated_at 2020_09_17;)