alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Fake OneDrive User-Agent Observed"; flow:established,to_server; http.user_agent; content:"Onedrive/25."; startswith; fast_pattern; threshold:type limit, count 1, seconds 300, track by_src; classtype:misc-activity; sid:2062772; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_06_04, deployment Perimeter, confidence Medium, signature_severity Informational, updated_at 2025_06_04; target:src_ip;)