alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Possible Broken/Filtered RIG EK Payload Download"; flow:established,from_server; http.header; content:"Content-Length|3a 20|3|0d 0a|"; fast_pattern; http.content_type; content:"application/x-msdownload"; bsize:24; file.data; content:"|3d 28 28|"; within:3; endswith; classtype:exploit-kit; sid:2023768; 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_01_27, deployment Perimeter, malware_family Exploit_Kit_RIG, performance_impact Low, confidence Medium, signature_severity Major, tag Exploit_kit_RIG, updated_at 2020_09_14;)