alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent (=Mozilla)"; flow:established,to_server; http.header; content:"User-Agent|3a|=Mozilla/5"; fast_pattern; classtype:trojan-activity; sid:2025456; rev:3; metadata:affected_product Web_Browsers, attack_target Client_and_Server, created_at 2018_03_27, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_25;)