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Description

Monitor for activities and techniques associated with Account Takover attacks against Azure Active Directory tenants.

  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel: Authentication, Risk
  • Last Updated: 2022-07-14
  • Author: Mauricio Velazco, Splunk
  • ID: 41514c46-7118-4eab-a9bb-f3bfa4e3bea9

Narrative

Azure Active Directory (Azure AD) is Microsofts enterprise cloud-based identity and access management (IAM) service. Azure AD is the backbone of most of Azure services like Office 365. It can sync with on-premise Active Directory environments and provide authentication to other cloud-based systems via the OAuth protocol. According to Microsoft, Azure AD manages more than 1.2 billion identities and processes over 8 billion authentications per day. Account Takeover (ATO) is an attack whereby cybercriminals gain unauthorized access to online accounts by using different techniques like brute force, social engineering, phishing & spear phishing, credential stuffing, etc. By posing as the real user, cyber-criminals can change account details, send out phishing emails, steal financial information or sensitive data, or use any stolen information to access further accounts within the organization. This analytic storic groups detections that can help security operations teams identify the potential compromise of Azure Active Directory accounts.

Detections

Name Technique Type
Azure AD Authentication Failed During MFA Challenge Compromise Accounts, Cloud Accounts, Valid Accounts, Cloud Accounts, Multi-Factor Authentication Request Generation TTP
Azure AD Block User Consent For Risky Apps Disabled Impair Defenses TTP
Azure AD Concurrent Sessions From Different Ips Browser Session Hijacking TTP
Azure AD Device Code Authentication Steal Application Access Token, Phishing, Spearphishing Link TTP
Azure AD High Number Of Failed Authentications For User Brute Force, Password Guessing TTP
Azure AD High Number Of Failed Authentications From Ip Brute Force, Password Guessing, Password Spraying TTP
Azure AD Multi-Factor Authentication Disabled Compromise Accounts, Cloud Accounts, Modify Authentication Process, Multi-Factor Authentication TTP
Azure AD Multi-Source Failed Authentications Spike Compromise Accounts, Cloud Accounts, Brute Force, Password Spraying, Credential Stuffing Hunting
Azure AD Multiple AppIDs and UserAgents Authentication Spike Valid Accounts Anomaly
Azure AD Multiple Denied MFA Requests For User Multi-Factor Authentication Request Generation TTP
Azure AD Multiple Failed MFA Requests For User Compromise Accounts, Cloud Accounts, Multi-Factor Authentication Request Generation, Valid Accounts, Cloud Accounts TTP
Azure AD Multiple Users Failing To Authenticate From Ip Compromise Accounts, Cloud Accounts, Brute Force, Password Spraying, Credential Stuffing Anomaly
Azure AD New MFA Method Registered For User Modify Authentication Process, Multi-Factor Authentication TTP
Azure AD OAuth Application Consent Granted By User Steal Application Access Token TTP
Azure AD Successful Authentication From Different Ips Brute Force, Password Guessing, Password Spraying TTP
Azure AD Successful PowerShell Authentication Compromise Accounts, Cloud Accounts, Valid Accounts, Cloud Accounts TTP
Azure AD Successful Single-Factor Authentication Compromise Accounts, Cloud Accounts, Valid Accounts, Cloud Accounts TTP
Azure AD Unusual Number of Failed Authentications From Ip Compromise Accounts, Cloud Accounts, Brute Force, Password Spraying, Credential Stuffing Anomaly
Azure AD User Consent Blocked for Risky Application Steal Application Access Token TTP
Azure AD User Consent Denied for OAuth Application Steal Application Access Token TTP
Azure Active Directory High Risk Sign-in Compromise Accounts, Cloud Accounts, Brute Force, Password Spraying TTP

Reference

source | version: 2