alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Data POST to an image file (png)"; flow:established,to_server; http.method; content:"POST"; nocase; http.uri; content:".png"; nocase; endswith; classtype:misc-activity; sid:2010070; rev:9; metadata:created_at 2010_07_30, deployment Perimeter, deprecation_reason Performance, performance_impact Significant, confidence Medium, signature_severity Informational, updated_at 2023_05_05;)