alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Bingo EK Payload Download"; flow:established,to_server; urilen:116; http.uri; content:"/?"; depth:2; pcre:"/^\/\?[a-f0-9]{114}$/"; http.user_agent; content:"WinHttp.WinHttpRequest.5"; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; content:!"Cookie|0d 0a|"; classtype:exploit-kit; sid:2024367; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2017_06_08, deployment Perimeter, malware_family Exploit_Kit, performance_impact Low, confidence High, signature_severity Major, tag Exploit_Kit_Bingo, updated_at 2020_11_05;)