O365 Oauth App Ews Mailbox Access

Date: 2024-02-01 ID: 7ffc2d34-d6c4-4987-bbfa-b1195a93affc Author: Mauricio Velazco Environment: attack_range Directory: o365_oauth_app_ews_mailbox_access

Description

Manually accessed O365 emails via Exchange Web Services and an OAuth application registration using a PowerShell script

MITRE ATT&CK Techniques

ID	Technique	Tactic
T1114.002	Remote Email Collection	Collection

Environment Details

Field	Value
Environment	attack_range
Directory	o365_oauth_app_ews_mailbox_access
Test Date	2024-02-01

Datasets

The following datasets were collected during this attack simulation:

O365_oauth_app_ews_mailbox_access

Path: /datasets/attack_techniques/T1114.002/o365_oauth_app_ews_mailbox_access/o365_oauth_app_ews_mailbox_access.log
Sourcetype: linux_secure
Source: linux_secure

The following detections in our security content repository use this attack data for testing:

Detection Name	Type	Source	MITRE ATT&CK	Analytic Story
O365 OAuth App Mailbox Access via EWS	`TTP`	Cloud	T1114.002	Office 365 Collection Techniques, NOBELIUM Group

Usage Instructions

Replay with Splunk Attack Data

Replay attack data with replay.py from Splunk Attack Data.

1python replay.py --dataset /datasets/attack_techniques/T1114.002/o365_oauth_app_ews_mailbox_access/o365_oauth_app_ews_mailbox_access.log --index attack_data

Manual Import

Download the dataset files from the paths listed above
Configure your Splunk instance with the appropriate sourcetypes
Import the logs using the Splunk Add Data wizard

Find more detections and analytics for this attack technique in our security content repository.

Source: GitHub | Version: 1.0