alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious User-Agent (Mozilla/5.0_)"; flow:established,to_server; http.user_agent; content:"Mozilla/5.0_"; fast_pattern; classtype:bad-unknown; sid:2037715; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_07_07, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_07;)