alert http $EXTERNAL_NET 443 -> $HOME_NET any (msg:"ET EXPLOIT_KIT CottonCastle/Niteris EK Landing Aug 17 2015"; flow:established,from_server; file_data; content:"ScriptEngineMajorVersion"; nocase; content:"ScriptEngineMinorVersion"; nocase; content:"ScriptEngineBuildVersion"; nocase; fast_pattern; content:"d27cdb6e-ae6d-11cf-96b8-444553540000"; nocase; classtype:exploit-kit; sid:2021638; rev:3; metadata:created_at 2015_08_17, confidence High, signature_severity Major, updated_at 2019_07_26;)