alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT NullHole EK Landing URI struct"; flow:established,to_server; content:"/e.html"; http_uri; fast_pattern; pcre:"/\/e\.html$/U"; content:"nhweb="; http_cookie; classtype:exploit-kit; sid:2021373; rev:3; metadata:created_at 2015_07_02, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;)