detecting-azure-service-principal-abuse

name	detecting-azure-service-principal-abuse
description	Detect and investigate Azure service principal abuse including privilege escalation, credential compromise, admin consent bypass, and unauthorized enumeration in Microsoft Entra ID environments. Use when detecting and investigate azure service principal abuse including privilege escalation,.
domain	cybersecurity
subdomain	cloud-security
tags	["azure","entra-id","service-principal","privilege-escalation","credential-abuse","detection","splunk","sentinel"]
version	1.0
author	oyi77
license	Apache-2.0
d3fend_techniques	["Token Binding","Restore Access","Application Protocol Command Analysis","Reissue Credential","Network Isolation"]
nist_csf	["PR.IR-01","ID.AM-08","GV.SC-06","DE.CM-01"]

Detecting Azure Service Principal Abuse

Overview

Azure service principals are identity objects used by applications, services, and automation tools to access Azure resources. Attackers exploit service principals for privilege escalation, lateral movement, and persistent access. Key abuse patterns include: adding credentials to existing principals, assigning privileged roles, bypassing admin consent, and enumerating service principals for attack paths. Application ownership grants the ability to manage credentials and configure permissions, creating hidden privilege escalation paths.

When to Use

Trigger phrases:

• "detecting azure service principal abuse"

• "Detect and investigate Azure service principal abuse including privilege escalat"

• When investigating security incidents that require detecting azure service principal abuse

• When building detection rules or threat hunting queries for this domain

• When SOC analysts need structured procedures for this analysis type

• When validating security monitoring coverage for related attack techniques

Prerequisites

• Azure subscription with Microsoft Entra ID P2 license
• Access to Azure AD Audit Logs and Sign-in Logs
• Microsoft Sentinel or Splunk for SIEM-based detection
• Microsoft Graph API permissions for investigation
• Global Reader or Security Reader role minimum

Key Abuse Patterns

• Follow the principle of least privilege — use the minimum permissions needed for each task
• Document everything — maintain logs of all actions, configurations, and findings
• Verify before acting — confirm assumptions about the environment before making changes
• Automate repetitive steps — script common workflows to reduce human error

1. New Credentials Added to Service Principal

Attackers add new client secrets or certificates to gain persistent access:

Detection Query (KQL - Sentinel):

AuditLogs
| where OperationName has "Add service principal credentials"
    or OperationName has "Update application - Certificates and secrets management"
| extend InitiatedBy = tostring(InitiatedBy.user.userPrincipalName)
| extend TargetSP = tostring(TargetResources[0].displayName)
| extend TargetSPId = tostring(TargetResources[0].id)
| project TimeGenerated, InitiatedBy, OperationName, TargetSP, TargetSPId
| sort by TimeGenerated desc