Chrome Extension Installed By User

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	Google Workspace Audit Logs
Detection Modules	Identity Threat Module, SaaS Threat Detection
Detector Tags	Google Workspace
ATT&CK Tactic	Initial Access (TA0001), Persistence (TA0003)
ATT&CK Technique	Supply Chain Compromise: Compromise Software Dependencies and Development Tools (T1195.001), Software Extensions: Browser Extensions (T1176.001)
Severity	Informational

Description

A Chrome extension was installed or updated by a Google Workspace user.

Attacker's Goals

Adversaries may leverage browser extensions installation to gain Initial Access and Persistence, enabling them to intercept credentials and hijack active web sessions.

Investigative actions

• Review the extension installed, it's OAuth scopes, reputation and permissions.
• Analyze subsequent network traffic from the user's device or browser for connections to newly registered domains.
• Investigate the source IP and identity for previous malicious activity or anomalies.