SaaS suspicious external domain user activity

Synopsis

Field	Value
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, SaaS Threat Detection
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

Field	Value
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.