Convert indexed Sigma rules into analyst-ready detections.
This studio is built around Phoenix's own rule corpus, not a blank editor. Search by title or rule id, choose a local pySigma backend, then reveal pipelines only when you actually need them.
Indexed Rules
3,779
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Backends
3
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pySigma Versions
2
Newest: 2.0.1
Translation Workspace
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Active Rule
Azure Sign-In With Axios User Agent
Backends follow their supported pySigma version. Select 1.5.1 for Elasticsearch, Kusto, and other 1.x plugins.
Target Profile
Splunk
Splunk through pysigma-backend-splunk.
Format Mode
Default
Default pySigma output mode for this backend.
Azure Sign-In With Axios User Agent
Using Splunk · Default · pySigma 2.0.1
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
title: Azure Sign-In With Axios User Agent
id: ea1a07f0-3dac-47a2-aeb4-86f5379ba2b4
status: experimental
description: |
Detects sign-in attempts in Azure/Entra ID logs where the user agent contains "axios",
indicating potential use of automated credential harvesting or AiTM phishing infrastructure.
Axios is a Node.js HTTP client abused to intercept and replay stolen credentials and MFA tokens.
When triaging results, analysts should:
- Check the sign-in risk level, MFA status, and conditional access results for signs of bypass.
- Look for sign-ins from unusual locations or IPs, especially if the same IP targets multiple accounts.
- Prioritize successful sign-ins over failed ones, as they may indicate a completed credential replay or AiTM attack.
references:
- https://thehackernews.com/2025/09/axios-abuse-and-salty-2fa-kits-fuel.html
- https://www.proofpoint.com/us/blog/threat-insight/http-client-tools-exploitation-account-takeover-attacks
author: Marco Pedrinazzi (@pedrinazziM) (InTheCyber)
date: 2026-04-28
tags:
- attack.credential-access
- attack.collection
- attack.t1557
- detection.threat-hunting
logsource:
product: azure
service: signinlogs
detection:
selection:
userAgent|contains: 'axios'
condition: selection
falsepositives:
- Legitimate internal or third-party applications built with Node.js that use Axios as their HTTP client for authenticating against Azure/Entra ID.
level: low
CLI command
Sigma CLI 4.0.0 · Install matching versions, then run from the Phoenix project directory.
python -m pip install 'sigma-cli==4.0.0' 'pysigma==2.0.1' 'pysigma-backend-splunk==3.0.0'
sigma convert --without-pipeline -t splunk -f default 'sigma/rules-threat-hunting/cloud/azure/signin_logs/azure_ad_signin_axios_user_agent.yml'