alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Symantec Download Flowbit Set"; flow:established,to_server; flowbits:set,ET.Symantec.Site.Download; flowbits:noalert; http.host; content:".symantec.com"; pcre:"/^(?:\x3a\d{1,5})?$/R"; classtype:misc-activity; sid:2023067; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_08_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, updated_at 2020_07_27, reviewed_at 2024_04_23;)