alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent Sample"; flow:established,to_server; http.user_agent; content:"sample"; startswith; classtype:trojan-activity; sid:2012611; rev:7; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2011_03_31, deployment Perimeter, confidence High, signature_severity Major, tag User_Agent, updated_at 2024_03_08;)