alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Evil Redirector Leading to EK Apr 21 2016 M2"; flow:established,to_server; content:"/idx.aspx?sid="; http_uri; content:"&bcOrigin="; http_uri; content:"&rnd="; http_uri; distance:0; classtype:exploit-kit; sid:2022752; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2016_04_21, deployment Perimeter, confidence High, signature_severity Major, tag Redirector, updated_at 2019_07_26;)