alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE 404 Response with an EXE Attached - Likely Malware Drop"; flow:established,from_server; http.stat_code; content:"404"; http.stat_msg; content:"Not Found"; file.data; content:"MZ"; within:2; byte_jump:4,58,relative,little; content:"PE|00 00|"; fast_pattern; distance:-64; within:4; classtype:attempted-admin; sid:2009028; rev:13; metadata:created_at 2010_07_30, confidence Medium, signature_severity Major, updated_at 2020_09_14;)