alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET SCAN OpenVAS User-Agent Inbound"; flow:established,to_server; http.user_agent; content:"OpenVAS"; reference:url,openvas.org; classtype:attempted-recon; sid:2012726; rev:6; metadata:created_at 2011_04_26, confidence High, signature_severity Informational, updated_at 2020_08_18;)