alert dns $HOME_NET any -> any any (msg:"ET EXPLOIT_KIT PurpleFox EK Domain in DNS Lookup"; dns.query; content:"rawcdn.githack.cyou"; nocase; bsize:19; reference:url,twitter.com/nao_sec/status/1343918070989877252; classtype:domain-c2; sid:2031461; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_12_29, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Exploit_Kit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_12_29;)