alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO EXE - SCR in PKZip Compressed Data Download"; flow:established,to_client; file_data; content:"PK"; within:2; content:".scr"; fast_pattern:only; nocase; classtype:bad-unknown; sid:2016767; rev:3; metadata:created_at 2013_04_18, confidence High, signature_severity Informational, updated_at 2019_07_26;)