alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Evil Redirector Leading to EK Jul 29"; flow:to_server,established; urilen:214; content:"Lzc1MTZmZDQzYWRhYTVl"; http_uri; fast_pattern; content:"=="; distance:54; http_uri; pcre:"/Host\x3a\x20a[a-z]{10}\.[a-z]{5}\./H"; classtype:exploit-kit; sid:2021559; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2015_07_31, deployment Perimeter, confidence High, signature_severity Major, tag Redirector, updated_at 2019_07_26;)