alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT [PTsecurity] Grandsoft EK Payload"; flow:established,to_client; http.stat_code; content:"200"; file_data; content:"|96 08 FA EC DE C0 22 84 66 58 4A BC 2E|"; fast_pattern; reference:url,www.malware-traffic-analysis.net/2018/03/15/index3.html; classtype:exploit-kit; sid:2025437; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_03_21, deployment Perimeter, malware_family GrandSoft_EK, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_15;)