Sunturai
Back to results
MediumMicrosoft Sentinel analytics

The download of potentially risky files from the Discord Content Delivery Network (CDN) (ASIM Web Session)

This detection mechanism identifies instances where requests are made to Discord CDN addresses for file extensions that are considered risky. It triggers when a callout is made to a Discord server that has only been…

Description

This detection mechanism identifies instances where requests are made to Discord CDN addresses for file extensions that are considered risky. It triggers when a callout is made to a Discord server that has only been encountered once in your environment. The uniqueness of Discord servers is determined based on the server ID present in the request URL (DiscordServerId in the query). Discord CDN has been utilized in numerous campaigns to download additional payloads, highlighting the importance of monitoring such activities. The query includes a sample set of popular web script extensions (scriptExtensions), which should be customized to align with the specific requirements of your environment

Detection logic

Detection requirements

Platform
ESXiLinuxmacOSNetwork DevicesWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Detections can measure how the public catalogue is used — which detections people look for, and which pages bring them here. It sets a cookie that recognises this browser for 180 days. It is never linked to an account and never follows you to other sites. Privacy notice