alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING User-Agent with Non Standard Characters"; flow:established,to_server; http.user_agent; content:"|3b 3b|"; content:"|3b 3b 2f 2e|"; distance:0; fast_pattern; content:"|2e|"; endswith; classtype:bad-unknown; sid:2044354; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_02_27, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_27; target:src_ip;)