---
title: Microsoft Graph Request User Impersonation by Unusual Client
description: This New Terms rule focuses on the first occurrence of a client application ID (azure.graphactivitylogs.properties.app_id) making a request to Microsoft...
url: https://www.elastic.co/docs/reference/security/prebuilt-rules/rules/integrations/azure/initial_access_graph_first_occurrence_of_client_request
products:
  - Elastic Security
---

# Microsoft Graph Request User Impersonation by Unusual Client
This New Terms rule focuses on the first occurrence of a client application ID
(azure.graphactivitylogs.properties.app_id) making a request to Microsoft Graph API for a specific tenant ID
(azure.tenant_id) and user principal object ID (azure.graphactivitylogs.properties.user_principal_object_id). This rule
may helps identify unauthorized access or actions performed by compromised accounts. Advesaries may succesfully
compromise a user's credentials and use the Microsoft Graph API to access resources or perform actions on behalf of the
user.
**Rule type**: new_terms
**Rule indices**:
- logs-azure.graphactivitylogs-*

**Rule Severity**: low
**Risk Score**: 21
**Runs every**: 
**Searches indices from**: `now-9m`
**Maximum alerts per execution**: 100
**References**:
- [[https://www.volexity.com/blog/2025/04/22/phishing-for-codes-russian-threat-actors-target-microsoft-365-oauth-workflows/](https://www.volexity.com/blog/2025/04/22/phishing-for-codes-russian-threat-actors-target-microsoft-365-oauth-workflows/)](https://www.volexity.com/blog/2025/04/22/phishing-for-codes-russian-threat-actors-target-microsoft-365-oauth-workflows/)
- [[https://pushsecurity.com/blog/consentfix](https://pushsecurity.com/blog/consentfix)](https://pushsecurity.com/blog/consentfix)

**Tags**:
- Domain: Cloud
- Data Source: Azure
- Data Source: Microsoft Graph
- Data Source: Microsoft Graph Activity Logs
- Resources: Investigation Guide
- Use Case: Identity and Access Audit
- Tactic: Initial Access

**Version**: 5
**Rule authors**:
- Elastic

**Rule license**: Elastic License v2

## Investigation guide


## Triage and analysis


### Investigating Microsoft Graph Request User Impersonation by Unusual Client

This rule detects the first observed occurrence of a Microsoft Graph API request by a specific client application ID (`azure.graphactivitylogs.properties.app_id`) in combination with a user principal object ID (`azure.graphactivitylogs.properties.user_principal_object_id`) and tenant ID (`azure.tenant_id`) within the last 14 days. This may indicate unauthorized access following a successful phishing attempt, token theft, or abuse of OAuth workflows.
Adversaries frequently exploit legitimate Microsoft or third-party application IDs to avoid raising suspicion during initial access. By using pre-consented or trusted apps to interact with Microsoft Graph, attackers can perform actions on behalf of users without triggering conventional authentication alerts or requiring additional user interaction.

### Possible investigation steps

- Review `azure.graphactivitylogs.properties.user_principal_object_id` and correlate with recent sign-in logs for the associated user.
- Determine whether `azure.graphactivitylogs.properties.app_id` is a known and approved application in your environment.
- Investigate the `user_agent.original` field for signs of scripted access (e.g., automation tools or libraries).
- Check the source IP address (`source.ip`) and geolocation data (`source.geo.*`) for unfamiliar origins.
- Inspect `azure.graphactivitylogs.properties.scopes` to understand the level of access being requested by the app.
- Examine any follow-up Graph API activity from the same `app_id` or `user_principal_object_id` for signs of data access or exfiltration.
- Correlate with device or session ID fields (`azure.graphactivitylogs.properties.c_sid`, if present) to detect persistent or repeat activity.


### False positive analysis

- First-time use of a legitimate Microsoft or enterprise-approved application.
- Developer or automation workflows initiating new Graph API requests.
- Valid end-user activity following device reconfiguration or new client installation.
- Maintain an allowlist of expected `app_id` values and known developer tools.
- Suppress detections from known good `user_agent.original` strings or approved source IP ranges.
- Use device and identity telemetry to distinguish trusted vs. unknown activity sources.
- Combine with session risk or sign-in anomaly signals where available.


### Response and remediation

- Reach out to the user and verify whether they authorized the application access.
- Revoke active OAuth tokens and reset credentials if unauthorized use is confirmed.
- Search for additional Graph API calls made by the same `app_id` or `user_principal_object_id`.
- Investigate whether sensitive resources (mail, files, Teams, contacts) were accessed.
- Apply Conditional Access policies to limit Graph API access by app type, IP, or device state.
- Restrict user consent for third-party apps and enforce admin approval workflows.
- Monitor usage of new or uncommon `app_id` values across your tenant.
- Provide user education on OAuth phishing tactics and reporting suspicious prompts.


## Rule Query

```kuery
event.dataset: "azure.graphactivitylogs"
    and event.type: "access"
    and azure.graphactivitylogs.properties.c_idtyp: "user"
    and azure.graphactivitylogs.properties.client_auth_method: 0
    and http.response.status_code: 200
    and url.domain: "graph.microsoft.com"
```

**Framework:** MITRE ATT&CK
- Tactic:
  - Name: Initial Access
- Id: TA0001
- Reference URL: [[https://attack.mitre.org/tactics/TA0001/](https://attack.mitre.org/tactics/TA0001/)](https://attack.mitre.org/tactics/TA0001/)
- Technique:
  - Name: Valid Accounts
- Id: T1078
- Reference URL: [[https://attack.mitre.org/techniques/T1078/](https://attack.mitre.org/techniques/T1078/)](https://attack.mitre.org/techniques/T1078/)
- Sub Technique:
  - Name: Cloud Accounts
- Id: T1078.004
- Reference URL: [[https://attack.mitre.org/techniques/T1078/004/](https://attack.mitre.org/techniques/T1078/004/)](https://attack.mitre.org/techniques/T1078/004/)

**Framework:** MITRE ATT&CK
- Tactic:
  - Name: Credential Access
- Id: TA0006
- Reference URL: [[https://attack.mitre.org/tactics/TA0006/](https://attack.mitre.org/tactics/TA0006/)](https://attack.mitre.org/tactics/TA0006/)
- Technique:
  - Name: Steal Application Access Token
- Id: T1528
- Reference URL: [[https://attack.mitre.org/techniques/T1528/](https://attack.mitre.org/techniques/T1528/)](https://attack.mitre.org/techniques/T1528/)