alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Observed Suspicious UA (xPCAP)"; flow:established,to_server; http.user_agent; content:"xPCAP"; bsize:5; classtype:bad-unknown; sid:2029748; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_03_27, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2020_03_27;)