alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Suspicious Executable (Win exe under 128)"; flow:established,from_server; content:"|0d 0a 0d 0a|MZ"; byte_test:4,<,128,58,relative,little; byte_jump:4,58,relative,little; content:"PE|00 00|"; distance:-64; within:4; classtype:policy-violation; sid:2009033; rev:7; metadata:created_at 2010_07_30, confidence Medium, signature_severity Unknown, updated_at 2019_07_26;)