Remote usage of an App engine Service Account token

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	5 Days
Required Data	Gcp Audit Log
Detection Modules	Cloud
ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	Steal Application Access Token (T1528), Unsecured Credentials (T1552)
Severity	Informational

Description

A GCP Service Account token, which is attached to an app engine, was used externally of the cloud environment.

Attacker's Goals

Exfiltrate token and abuse it remotely.

Investigative actions

• Check if the Service Account was attached to a specific app engine.
• Check if the Service Account was used by a user.
• Check if the relevant app engine is compromised.

Variations

Suspicious usage of App engine Service Account token

Synopsis

Field	Value
ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	Steal Application Access Token (T1528), Unsecured Credentials (T1552)
Severity	High

Description

A GCP Service Account token, which is attached to an app engine, was used externally of the cloud environment.

Attacker's Goals

Exfiltrate token and abuse it remotely.

Investigative actions

• Check if the Service Account was attached to a specific app engine.
• Check if the Service Account was used by a user.
• Check if the relevant app engine is compromised.