Azure Entra ID Sign-ins with User-Agent Containing "axios"

Flags Azure Entra ID sign-ins with a user agent containing "axios", indicating potential automated sign-in activity.

FreeReviewedSigma · Low · v5

Product: azure
Service: signinlogs
Author: Marco Pedrinazzi (@pedrinazziM) (InTheCyber) (SigmaHQ), DRL 1.1
Published: 2026-04-28
Updated: 2026-07-31

ATT&CK techniques

Cred Access → Collection

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1557Adversary-in-the-Middle
Discovery
Lateral Movement
Collection
- T1557Adversary-in-the-Middle
C2
Exfiltration
Impact

What it detects

This rule flags Azure/Entra ID sign-in attempts whose recorded user agent contains the string "axios". Attackers may use HTTP client tooling to automate authentication flows, which can be associated with credential harvesting or token replay activity. The detection relies on Azure sign-in log fields that capture the user agent for each sign-in attempt.

Reporting behind it

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Suspicious Tycoon Phishing-as-a-Service Credential Exfiltration Path (via proxy)

Suspicious OfficeHome Sign-In With Axios User Agent via Tycoon 2FA Proxy

Suspicious AWS AiTM Phishing Kit Endpoint Access via Proxy

Possible AiTM Phishing Sign-On Evaluation Denied by Okta FastPass

Azure Entra ID Sign-ins with User-Agent Containing "axios"

Pivot detection · T1557 · 9 related

Changelog

v5
Candidate ingested via manual entry.2026-07-31
v4
Candidate ingested via manual entry.2026-07-31
v3
Candidate ingested via manual entry.2026-07-31
v2
Candidate ingested via manual entry.2026-07-31
v1
No 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.

azure-entra-id-sign-in-using-axios-user-agent-ea1a07f0

title: Azure Entra ID Sign-ins with User-Agent Containing "axios"
id: 5394c458-b9f3-438b-94c9-f3b663cfdfe6
status: experimental
description: This rule flags Azure/Entra ID sign-in attempts whose recorded user agent contains the string "axios". Attackers may use HTTP client tooling to automate authentication flows, which can be associated with credential harvesting or token replay activity. The detection relies on Azure sign-in log fields that capture the user agent for each sign-in attempt.
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
  - https://github.com/SigmaHQ/sigma/blob/master/rules-threat-hunting/cloud/azure/signin_logs/azure_ad_signin_axios_user_agent.yml
author: Marco Pedrinazzi (@pedrinazziM) (InTheCyber), Huntrule Team
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
license: DRL-1.1
related:
  - id: ea1a07f0-3dac-47a2-aeb4-86f5379ba2b4
    type: derived

Convert

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