alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT DNSChanger EK Secondary Landing Oct 31 2016"; flow:established,from_server; file_data; content:".controlurl"; nocase; pcre:"/^[\s\x2c\x3b]/Rs"; content:".schematype"; nocase; pcre:"/^[\s\x2c\x3b]/Rs"; content:".csrf"; nocase; pcre:"/^[\s\x2c\x3b]/Rs"; content:".port"; nocase; pcre:"/^[\s\x2c\x3b]/Rs"; content:"upnp"; nocase; content:" ip"; nocase; pcre:"/^\s*=\s*[\x22\x27]?(?:10|127|172\.(?:1[6-9]|2[0-9]|3[01])|192\.168)\./R"; classtype:exploit-kit; sid:2023473; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2016_11_01, deployment Perimeter, malware_family DNSEK, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_08_20;)