Sunturai
Back to results
UnknownMicrosoft Sentinel analytics

Base64 encoded IPv4 address in request url

This query detects Base64-encoded IPv4 addresses in outbound request URLs. It uses pre-computed base64 offsets for IPv4 sequences, eliminating the need for decoding. After identifying a candidate,the query extracts…

Description

This query detects Base64-encoded IPv4 addresses in outbound request URLs. It uses pre-computed base64 offsets for IPv4 sequences, eliminating the need for decoding. After identifying a candidate,the query extracts the plaintext IPv4 address pattern.

Detection logic

Detection requirements

Platform
ESXiLinuxmacOSNetwork DevicesWindows

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

Log source product
checkpointfortinetpaloaltonetworkszscaler
Log source service
commonsecuritylog

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