alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT GrandSoft EK IE Exploit Jan 30 2018"; flow:established,from_server; file_data; content:"|3d 20 22 2c|&h|22|"; nocase; fast_pattern; content:"4d"; nocase; content:"5a"; nocase; within:20; content:"responseBody"; nocase; content:"Dim "; nocase; content:"Dim "; nocase; distance:0; content:"Win32_OperatingSystem"; nocase; classtype:exploit-kit; sid:2025272; rev:3; metadata:created_at 2018_01_30, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;)