alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE JS/WSF Downloader Dec 08 2016 M4"; flow:established,to_client; flowbits:isset,et.IE7.NoRef.NoCookie; http.content_type; content:"image|2f|"; startswith; file.data; content:"MZ"; within:2; byte_jump:4,58,relative,little; content:"PE|00 00|"; fast_pattern; distance:-64; within:4; classtype:trojan-activity; sid:2023672; rev:8; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_12_19, deployment Perimeter, malware_family JS_WSF, confidence High, signature_severity Major, updated_at 2024_04_13;)