alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Observed Suspicious UA (My Agent)"; flow:established,to_server; http.user_agent; content:"My Agent"; startswith; endswith; classtype:bad-unknown; sid:2027650; rev:4; metadata:attack_target Client_Endpoint, created_at 2019_07_01, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_13;)