alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent (MyAgent)"; flow:to_server,established; threshold:type limit, count 2, track by_src, seconds 300; http.header; content:!"www.google-analytics.com"; http.user_agent; content:"MyAgent"; depth:7; fast_pattern; http.host; content:!"driverdl.lenovo.com.cn"; classtype:trojan-activity; sid:2005320; rev:16; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, confidence High, signature_severity Major, tag User_Agent, updated_at 2021_06_15;)