alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Executable Download From Russian Content-Language Website"; flow:established,to_client; http.header; header_lowercase; content:"|0d 0a|content-language|3a 20|ru"; fast_pattern; nocase; file.data; content:"MZ"; startswith; byte_jump:4,58,relative,little; content:"PE|00 00|"; distance:-64; within:4; classtype:misc-activity; sid:2012523; rev:11; metadata:created_at 2011_03_21, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2024_05_06; target:dest_ip;)