alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent (contains loader)"; flow:to_server,established; threshold:type limit,count 2,track by_src,seconds 300; http.user_agent; content:"|20|loader"; fast_pattern; classtype:trojan-activity; sid:2008276; 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 2020_08_13;)