alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Cool PDF July 15 2013"; flow:established,to_client; flowbits:isset,ET.pdf.in.http; file.data; content:".txt?e="; fast_pattern; nocase; content:"<script"; nocase; content:"http|3a 2f 2f|"; distance:0; pcre:"/^[^\x3b\r\n\x22\x27]+?\.txt\?e=\d+(&[fh]=\d)?/R"; classtype:exploit-kit; sid:2017150; rev:14; metadata:created_at 2013_07_16, signature_severity Major, updated_at 2024_03_13;)