alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO McAfee AV Download (set)"; flow:established,to_server; flowbits:set,ET.Mcafee.Site.Download; flowbits:noalert; http.method; content:"GET"; http.user_agent; content:"McAfee ePO"; fast_pattern; http.host; content:"update.nai.com"; classtype:not-suspicious; sid:2031317; rev:1; metadata:created_at 2020_12_11, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_12_11;)