alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Styx PDF July 15 2013"; flow:from_server,established; flowbits:isset,ET.pdf.in.http; file_data; content:".exe?"; fast_pattern; nocase; content:"<script"; nocase; content:"http|3a 2f 2f|"; distance:0; pcre:"/^[^\x3b\r\n\x22\x27]+?[A-Za-z0-9\/\_\-]{60,}\.exe\?/R"; classtype:exploit-kit; sid:2017151; rev:13; metadata:created_at 2013_07_16, signature_severity Major, updated_at 2019_10_08;)