alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Binary Download Smaller than 1 MB Likely Hostile"; flow:established,to_client; http.content_len; bsize:5; file.data; content:"MZ"; fast_pattern; startswith; byte_jump:4,58,relative,little; content:"PE|00 00|"; distance:-64; within:4; classtype:policy-violation; sid:2007671; rev:18; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2024_04_10;)