alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING SUSPICIOUS Dotted Quad Host MZ Response"; flow:established,to_client; flowbits:isset,http.dottedquadhost; file_data; content:"MZ"; within:2; content:"PE|00 00|"; distance:0; classtype:bad-unknown; sid:2021076; rev:2; metadata:created_at 2015_05_08, confidence Medium, signature_severity Informational, updated_at 2019_07_26;)