Sunturai
Back to results
MediumMicrosoft Sentinel analytics

Rare client observed with high reverse DNS lookup count

Identifies clients with a high reverse DNS counts that could be carrying out reconnaissance or discovery activity. Alerts are generated if the IP performing such reverse DNS lookups was not seen doing so in the…

Description

Identifies clients with a high reverse DNS counts that could be carrying out reconnaissance or discovery activity. Alerts are generated if the IP performing such reverse DNS lookups was not seen doing so in the preceding 7-day period.

Detection logic

Detection requirements

Platform
ContainersIaaSLinuxmacOSNetwork DevicesWindows

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

Log source product
dns
Log source service
dnsevents

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