alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING URL Shortening Service Used by Curl (ic9 .in)"; flow:established,to_server; http.user_agent; content:"curl/"; startswith; http.host; bsize:6; content:"ic9.in"; fast_pattern; classtype:bad-unknown; sid:2033134; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_06_10, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_25;)