LoFP LoFP / authorized red team or audit activity. add exceptions on the calling user after review.

Techniques

Sample rules

Azure AD Graph Access with Unusual Client and User

Description

Identifies Azure AD Graph (graph.windows.net) requests where the combination of calling OAuth client (“azure.aadgraphactivitylogs.properties.app_id”) and signed-in user (“user.id”) has not been observed in the tenant in a historical window. A user appearing against AAD Graph under an OAuth client that has not previously authenticated that user is a sign of a FOCI swap, a phished refresh token being redeemed for a new client, or an adversary running tooling under a client identity the user does not normally use.

Detection logic

data_stream.dataset:"azure.aadgraphactivitylogs" and
    azure.aadgraphactivitylogs.properties.actor_type : "User" and
    azure.aadgraphactivitylogs.properties.app_id: (* and not (
        "74658136-14ec-4630-ad9b-26e160ff0fc6" or
        "bb8f18b0-9c38-48c9-a847-e1ef3af0602d" or
        "00000006-0000-0ff1-ce00-000000000000" or
        "18ed3507-a475-4ccb-b669-d66bc9f2a36e")
    ) and user.id:*