M365 Identity OAuth Flow by First-Party Microsoft App from Multiple IPs

Last updated 2 months ago on 2025-12-17
Created 9 months ago on 2025-05-01

About

Identifies sign-ins on behalf of a principal user to the Microsoft Graph or legacy Azure AD API from multiple IPs using first-party Microsoft applications from the FOCI (Family of Client IDs) group. Developer tools like Azure CLI, VSCode, and Azure PowerShell accessing these resources from multiple IPs are flagged, along with any FOCI application accessing the deprecated Windows Azure Active Directory from multiple IPs. This behavior may indicate an adversary using a phished OAuth authorization code or refresh token, as seen in attacks like ConsentFix where attackers steal localhost OAuth codes and replay them from attacker infrastructure.
Tags
Domain: CloudDomain: EmailDomain: IdentityData Source: Microsoft 365Data Source: Microsoft 365 Audit LogsUse Case: Identity and Access AuditUse Case: Threat DetectionTactic: Defense EvasionLanguage: esql
Severity
high
Risk Score
73
MITRE ATT&CK™

Defense Evasion (TA0005)(external, opens in a new tab or window)

Credential Access (TA0006)(external, opens in a new tab or window)

Initial Access (TA0001)(external, opens in a new tab or window)

License
Elastic License v2(external, opens in a new tab or window)

Definition

Integration Pack
Prebuilt Security Detection Rules
Related Integrations

o365(external, opens in a new tab or window)

Query
text code block:
from logs-o365.audit-* | where event.dataset == "o365.audit" and event.action == "UserLoggedIn" and source.ip is not null and o365.audit.UserId is not null and o365.audit.ApplicationId is not null and o365.audit.UserType in ("0", "2", "3", "10") and ( /* Developer tools accessing Graph OR Legacy AAD */ ( o365.audit.ApplicationId in ( "aebc6443-996d-45c2-90f0-388ff96faa56", "29d9ed98-a469-4536-ade2-f981bc1d605e", "04b07795-8ddb-461a-bbee-02f9e1bf7b46", "1950a258-227b-4e31-a9cf-717495945fc2" ) and o365.audit.ObjectId in ( "00000003-0000-0000-c000-000000000000", "00000002-0000-0000-c000-000000000000" ) ) or /* Any FOCI app accessing Legacy AAD only */ ( o365.audit.ApplicationId in ( "00b41c95-dab0-4487-9791-b9d2c32c80f2", "1fec8e78-bce4-4aaf-ab1b-5451cc387264", "26a7ee05-5602-4d76-a7ba-eae8b7b67941", "27922004-5251-4030-b22d-91ecd9a37ea4", "4813382a-8fa7-425e-ab75-3b753aab3abb", "ab9b8c07-8f02-4f72-87fa-80105867a763", "d3590ed6-52b3-4102-aeff-aad2292ab01c", "872cd9fa-d31f-45e0-9eab-6e460a02d1f1", "af124e86-4e96-495a-b70a-90f90ab96707", "2d7f3606-b07d-41d1-b9d2-0d0c9296a6e8", "844cca35-0656-46ce-b636-13f48b0eecbd", "87749df4-7ccf-48f8-aa87-704bad0e0e16", "cf36b471-5b44-428c-9ce7-313bf84528de", "0ec893e0-5785-4de6-99da-4ed124e5296c", "22098786-6e16-43cc-a27d-191a01a1e3b5", "4e291c71-d680-4d0e-9640-0a3358e31177", "57336123-6e14-4acc-8dcf-287b6088aa28", "57fcbcfa-7cee-4eb1-8b25-12d2030b4ee0", "66375f6b-983f-4c2c-9701-d680650f588f", "9ba1a5c7-f17a-4de9-a1f1-6178c8d51223", "a40d7d7d-59aa-447e-a655-679a4107e548", "a569458c-7f2b-45cb-bab9-b7dee514d112", "b26aadf8-566f-4478-926f-589f601d9c74", "c0d2a505-13b8-4ae0-aa9e-cddd5eab0b12", "d326c1ce-6cc6-4de2-bebc-4591e5e13ef0", "e9c51622-460d-4d3d-952d-966a5b1da34c", "eb539595-3fe1-474e-9c1d-feb3625d1be5", "ecd6b820-32c2-49b6-98a6-444530e5a77a", "f05ff7c9-f75a-4acd-a3b5-f4b6a870245d", "f44b1140-bc5e-48c6-8dc0-5cf5a53c0e34", "be1918be-3fe3-4be9-b32b-b542fc27f02e", "cab96880-db5b-4e15-90a7-f3f1d62ffe39", "d7b530a4-7680-4c23-a8bf-c52c121d2e87", "dd47d17a-3194-4d86-bfd5-c6ae6f5651e3", "e9b154d0-7658-433b-bb25-6b8e0a8a7c59" ) and o365.audit.ObjectId == "00000002-0000-0000-c000-000000000000" ) ) | eval Esql.time_window_date_trunc = date_trunc(30 minutes, @timestamp), Esql.oauth_authorize_user_id_case = case( o365.audit.ExtendedProperties.RequestType == "OAuth2:Authorize" and o365.audit.ExtendedProperties.ResultStatusDetail == "Redirect", o365.audit.UserId, null ), Esql.oauth_token_user_id_case = case( o365.audit.ExtendedProperties.RequestType == "OAuth2:Token", o365.audit.UserId, null ) | stats Esql.source_ip_count_distinct = count_distinct(source.ip), Esql.source_ip_values = values(source.ip), Esql.o365_audit_ApplicationId_values = values(o365.audit.ApplicationId), Esql.source_as_organization_name_values = values(source.`as`.organization.name), Esql.oauth_token_count_distinct = count_distinct(Esql.oauth_token_user_id_case), Esql.oauth_authorize_count_distinct = count_distinct(Esql.oauth_authorize_user_id_case) by o365.audit.UserId, Esql.time_window_date_trunc, o365.audit.ApplicationId, o365.audit.ObjectId | keep Esql.time_window_date_trunc, Esql.source_ip_values, Esql.source_ip_count_distinct, Esql.o365_audit_ApplicationId_values, Esql.source_as_organization_name_values, Esql.oauth_token_count_distinct, Esql.oauth_authorize_count_distinct | where Esql.source_ip_count_distinct >= 2 and Esql.oauth_token_count_distinct > 0 and Esql.oauth_authorize_count_distinct > 0

Install detection rules in Elastic Security

Detect M365 Identity OAuth Flow by First-Party Microsoft App from Multiple IPs in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).