alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS ESET Installer"; flow:established,to_server; threshold:type limit, track by_src, seconds 180, count 1; http.user_agent; content:"ESET Installer"; startswith; endswith; classtype:policy-violation; sid:2027219; rev:5; metadata:attack_target Client_Endpoint, created_at 2019_04_17, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag PUA, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_13;)