alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET USER_AGENTS FOCA User-Agent"; flow:established,to_server; http.method; content:"GET"; http.user_agent; content:"FOCA"; fast_pattern; startswith; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; content:!"|0d 0a|Accept|0d 0a|"; reference:url,github.com/ElevenPaths/FOCA; classtype:attempted-recon; sid:2017949; rev:7; metadata:created_at 2014_01_10, confidence High, signature_severity Informational, updated_at 2024_03_10;)