Successful unusual guest user invitation

Cortex XDR Analytics Alert Reference by Alert name

Product
Cortex XDR
Last date published
2024-06-18
Category
Analytics Alert Reference
Order
Alert name

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

N/A (single event)

Deduplication Period

1 Day

Required Data

  • Requires:
    • AzureAD Audit Log

Detection Modules

Identity Threat Module

ATT&CK Tactic

Persistence (TA0003)

ATT&CK Technique

Valid Accounts (T1078)

Severity

Informational

Description

An identity successfully invited a guest user to the tenant with unusual characteristics.

Attacker's Goals

An attacker can invite users to for evasion.

Investigative actions

  • Check who is the invited guest user.
  • Check whether the inviter is permitted to perform such actions.
  • Check if the domain of the invited guest is allowed for invitations in the organization.

Variations

Rare successful guest invitation in the organization

Synopsis

ATT&CK Tactic

Persistence (TA0003)

ATT&CK Technique

Valid Accounts (T1078)

Severity

Low

Description

An identity successfully invited a suspicious guest user to the tenant.

Attacker's Goals

An attacker can invite users to for evasion.

Investigative actions

  • Check who is the invited guest user.
  • Check whether the inviter is permitted to perform such actions.
  • Check if the domain of the invited guest is allowed for invitations in the organization.