alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT LightsOut EK Exploit/Payload Request"; flow:to_server,established; content:".php?a="; http_uri; fast_pattern:only; nocase; pcre:"/\.php\?a=(?:dw[a-z0-9]|[hr][2-7])$/U"; reference:url,vrt-blog.snort.org/2014/03/hello-new-exploit-kit.html; classtype:exploit-kit; sid:2018207; rev:2; metadata:created_at 2014_03_05, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)