alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Minimal HTTP GET Request to cl .ly"; flow:established,to_server; http.method; content:"GET"; http.host; dotprefix; content:".cl.ly"; fast_pattern; endswith; http.header_names; to_lowercase; content:!"|0d 0a|accept"; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; classtype:bad-unknown; sid:2031588; rev:3; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2021_01_29, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2024_04_30;)