SaaS suspicious external domain user activity

Cortex XDR Analytics Alert Reference by Alert name

Product

Cortex XDR

Last date published

2024-10-08

Synopsis

Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	Requires one of the following data sources: Google Workspace Audit Logs OR Office 365 Audit
Detection Modules	Identity Threat Module
Detector Tags
ATT&CK Tactic	Initial Access (TA0001)
ATT&CK Technique	External Remote Services (T1133)
Severity	Informational

Description

An operation was performed by an identity. This identity belongs to a domain that was not seen in the organization before.

Attacker's Goals

Gain their initial foothold within the organization and explore the environment to achieve their target.

Investigative actions

investigate the external domain name.
Check the identity activity in the organization.

Variations

Suspicious external user activity detected from a domain first seen in the organization

Synopsis

ATT&CK Tactic	Initial Access (TA0001)
ATT&CK Technique	External Remote Services (T1133)
Severity	Low

Description

An operation was performed by an identity. This identity belongs to a domain that was not seen in the organization, both in cloud and SaaS environments.

Attacker's Goals

Gain their initial foothold within the organization and explore the environment to achieve their target.

Investigative actions

investigate the external domain name.
Check the identity activity in the organization.