alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED NE EXE Windows 3.x file download"; flow:established; content:"MZ"; isdataat:76,relative; content:"This program requires Microsoft Windows."; isdataat:10,relative; content:"NE"; distance:0; reference:url,www.itee.uq.edu.au/~cristina/students/david/honoursThesis96/bff.htm; classtype:misc-activity; sid:2000425; rev:9; metadata:created_at 2010_07_30, signature_severity Unknown, updated_at 2019_07_26;)