alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET EXPLOIT_KIT RIG Payload URI Struct March 20 2015";
flow:established,to_server;
urilen:>220;
http.uri;
content:"/index.php?"; depth:11;
content:"=l3S"; fast_pattern; offset:26; depth:4;
pcre:"/^\/index\.php\?[A-Za-z0-9_-]{15}=l3S/";
http.header_names;
content:!"Referer|0d 0a|";
classtype:exploit-kit;
sid:2020720; rev:3;
metadata:created_at 2015_03_21, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_19;
)