Azure AD sign in from AADinternals default user agent

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Classification:

attack

Set up the azure integration.

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Goal

Detect when the AADInternals default user agent is seen in Azure AD sign-in logs.

Strategy

This rule monitors Azure AD sign-in logs for the default user agent AADInternals (this default user agent can be altered). AADInternals toolkit is a PowerShell module containing tools for administering and exploiting Azure AD and Office 365. It is listed in MITRE ATT&CK with id S0677 and has been associated with a number of threat groups.

Triage and response

Determine if your organization has authorized the use of the AADInternals toolkit.
If the results of triage indicate that this tool is not used by your organization, begin your company’s incident response process and an investigation.
- If appropriate, disable the affected identity and revoke any sign-in sessions.
- Investigate any actions taken by the identity {{@usr.id}} during the identified time frame.