alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Windows OS Submitting USB Metadata to Microsoft"; flow:established,to_server; threshold:type limit, seconds 300, count 1, track by_src; http.method; content:"POST"; http.uri; content:"metadata.svc"; endswith; http.header; content:"/DeviceMetadataService/GetDeviceMetadata|22 0d 0a|"; http.user_agent; content:"MICROSOFT_DEVICE_METADATA_RETRIEVAL_CLIENT"; depth:42; endswith; fast_pattern; classtype:misc-activity; sid:2025275; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_01_31, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17;)