Download Event Upd | Sysmon File

When a file is downloaded from the internet using a browser like Chrome or Edge, the operating system attaches a "Mark of the Web" (MotW) to it. This is stored in a hidden stream called Zone.Identifier .

See exactly which browser or application (e.g., chrome.exe ) was responsible for the download. Core Data Fields in Event ID 15 sysmon file download event

Log the hash (MD5, SHA256, etc.) of the downloaded content immediately upon arrival. When a file is downloaded from the internet

To effectively hunt for threats, you need to understand the fields provided in the Sysmon Operational log : Sysmon Event ID 11 - FileCreate Core Data Fields in Event ID 15 Log

While standard file creation events (Event ID 11) tell you a file was written to disk, they often lack the context of its origin. Event ID 15 fills this gap by leveraging NTFS Alternate Data Streams (ADS) to identify files arriving via web browsers or email clients. What is a Sysmon File Download Event?

Track the URL or referrer that initiated the download.