alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO HTTP Request to Suspicious *.biz Domain"; flow:established,to_server; content:".biz"; fast_pattern; http_host; isdataat:!1,relative; reference:url,www.spamhaus.org/statistics/tlds/; classtype:bad-unknown; sid:2027872; rev:2; metadata:created_at 2019_08_13, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, updated_at 2019_08_13;)