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MediumMicrosoft Sentinel analytics

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

This rule identifies clients with high reverse DNS counts, which could be carrying out reconnaissance or discovery activity. This helps in detecting the possible initial phases of an attack, like discovery and…

Description

This rule identifies clients with high reverse DNS counts, which could be carrying out reconnaissance or discovery activity. 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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