Azure sign-in logs: Detect AzureHound discovery tool via default User-Agent
Flags successful Azure sign-ins where the User-Agent contains "azurehound", indicating AzureHound discovery.
- Product
- azure
- Service
- signinlogs
- Author
- Janantha Marasinghe (SigmaHQ), DRL 1.1
- Published
- 2022-11-27
- Updated
- 2026-07-31
ATT&CK techniques
DiscoveryRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule identifies activity consistent with AzureHound by matching the default User-Agent string used after a successful sign-in. Attackers often run AzureHound to enumerate Azure AD and related permissions for subsequent discovery and targeting. The detection relies on Azure sign-in log telemetry, specifically the User-Agent field and the ResultType indicating successful authentication.
Reporting behind it
Changelog
v5- v5Candidate ingested via manual entry.2026-07-31
- v4Candidate ingested via manual entry.2026-07-31
- v3Candidate ingested via manual entry.2026-07-31
- v2Candidate ingested via manual entry.2026-07-31
- v1No changelog recorded for this version.2026-07-30
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
title: "Azure sign-in logs: Detect AzureHound discovery tool via default User-Agent"
id: 38e586ac-6c82-4350-ada5-b20895084950
status: test
description: This rule identifies activity consistent with AzureHound by matching the default User-Agent string used after a successful sign-in. Attackers often run AzureHound to enumerate Azure AD and related permissions for subsequent discovery and targeting. The detection relies on Azure sign-in log telemetry, specifically the User-Agent field and the ResultType indicating successful authentication.
references:
- https://github.com/BloodHoundAD/AzureHound
- https://github.com/SigmaHQ/sigma/blob/master/rules/cloud/azure/signin_logs/azure_ad_azurehound_discovery.yml
author: Janantha Marasinghe, Huntrule Team
date: 2022-11-27
tags:
- attack.discovery
- attack.t1087.004
- attack.t1526
logsource:
product: azure
service: signinlogs
detection:
selection:
userAgent|contains: azurehound
ResultType: 0
condition: selection
falsepositives:
- Unknown
level: high
license: DRL-1.1
related:
- id: 35b781cc-1a08-4a5a-80af-42fd7c315c6b
type: derived