alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT X20 EK Download Aug 07 2013"; flow:established,to_client; flowbits:set,et.exploitkitlanding; http.header; content:"filename=app.jar|0d 0a|"; fast_pattern; file.data; content:"PK"; within:2; content:"|CA FE BA BE|"; distance:0; classtype:exploit-kit; sid:2017299; rev:9; metadata:created_at 2013_08_08, confidence High, signature_severity Major, updated_at 2024_03_04;)