alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Suspicious EXE Download Content-Type image/jpeg"; flow:established,to_client; flowbits:isnotset,ET.http.binary; flowbits:isnotset,ET.INFO.WindowsUpdate; flowbits:set,ET.http.binary; http.content_type; content:"image/jpeg"; startswith; endswith; file.data; content:"MZ"; within:2; byte_jump:4,58,relative,little; content:"PE|00 00|"; distance:-64; within:4; fast_pattern; classtype:policy-violation; sid:2026537; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_23, deployment Perimeter, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2024_04_13;)