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;)