alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Secondary Flash Request Seen (no alert)"; flow:established,to_server; flowbits:set,ET.SecondaryFlash.Req; flowbits:noalert; http.referer; content:"/[[DYNAMIC]]/1"; fast_pattern; http.header_names; content:"x-flash-version"; classtype:not-suspicious; sid:2025411; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_03_09, deployment Perimeter, deprecation_reason Relevance, confidence High, signature_severity Major, tag Sundown_EK, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_25;)