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MediumMicrosoft Sentinel analytics

Rare client observed with high reverse DNS lookup count - Anomaly based (ASIM DNS Solution)

This rule makes use of the series decompose anomaly method to identify clients with high reverse DNS counts. This helps in detecting the possible initial phases of an attack, like discovery and reconnaissance. It…

Description

This rule makes use of the series decompose anomaly method to identify clients with high reverse DNS counts. This helps in detecting the possible initial phases of an attack, like discovery and reconnaissance. It utilizes [ASIM](https://aka.ms/AboutASIM) normalization and is applied to any source that supports the ASIM DNS schema.

Detection logic

Detection requirements

Platform
PRE

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

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