What it does. Configures Google Workspace advanced phishing and malware protection settings in the Admin Console — pre-delivery message scanning, attachment protection, spoofing/impersonation detection, and Enhanced Safe Browsing enforcement. Use when hardening Gmail against phishing, spoofing, and malware, or when tuning Workspace email security policies. Part of mukul975/Anthropic-Cybersecurity-Skills (817 security skills) (mukul975/Anthropic-Cybersecurity-Skills).

Install

• npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-google-workspace-phishing-protection, or copy the skill folder into ~/.claude/skills/implementing-google-workspace-phishing-protection/.
• Raw file: curl -sL https://raw.githubusercontent.com/mukul975/Anthropic-Cybersecurity-Skills/HEAD/skills/implementing-google-workspace-phishing-protection/SKILL.md

SKILL.md (verbatim)

name: implementing-google-workspace-phishing-protection
description: Configures Google Workspace advanced phishing and malware protection settings in the Admin Console — pre-delivery message scanning, attachment protection, spoofing/impersonation detection, and Enhanced Safe Browsing enforcement. Use when hardening Gmail against phishing, spoofing, and malware, or when tuning Workspace email security policies.
domain: cybersecurity
subdomain: phishing-defense
tags:
- google-workspace
- gmail
- phishing
- email-security
- safe-browsing
- anti-spoofing
- admin-console
version: '1.0'
author: mahipal
license: Apache-2.0
nist_csf:
- PR.AT-01
- DE.CM-09
- RS.CO-02
- DE.AE-02
mitre_attack:
- T1566
- T1598
- T1534
- T1036
- T1027
mitre_f3:
  version: '1.1'
  tactics:
  - reconnaissance
  - resource-development
  - initial-access
  - stealth
  techniques:
  - id: T1660
    name: Phishing
    tactic: initial-access
    source: attack
  - id: T1598
    name: Phishing for Information
    tactic: reconnaissance
    source: attack
  - id: T1672
    name: Email Spoofing
    tactic: stealth
    source: attack
  - id: F1032
    name: Impersonate Official
    tactic: initial-access
    source: f3
  - id: F1031
    name: Impersonate Account Holder
    tactic: initial-access
    source: f3
  - id: F1020.002
    name: 'Create Fake Materials: Fake Website'
    tactic: resource-development
    source: f3

Implementing Google Workspace Phishing Protection

Overview

Google Workspace provides advanced phishing and malware protection through the Admin Console under Apps > Google Workspace > Gmail > Safety. Key features include Enhanced Pre-Delivery Scanning that examines messages more thoroughly before they reach inboxes, attachment and link protection that scans for malware and checks against known malicious sites, and spoofing detection for domain and employee name impersonation. Google's Advanced Protection Program (APP) provides the strongest account security for high-privilege users.

When to Use

• When deploying or configuring implementing google workspace phishing protection capabilities in your environment
• When establishing security controls aligned to compliance requirements
• When building or improving security architecture for this domain
• When conducting security assessments that require this implementation

Prerequisites

• Google Workspace Business Standard or higher license
• Gmail Settings administrator privilege
• Understanding of organizational email flow and third-party integrations
• Access to Google Admin Console (admin.google.com)
• DNS management access for SPF, DKIM, DMARC configuration

Workflow

Step 1: Configure Advanced Phishing Protection

• Navigate to Admin Console > Apps > Google Workspace > Gmail > Safety
• Enable "Protect against domain spoofing based on similar domain names"
• Enable "Protect against spoofing of employee names"
• Enable "Protect against inbound emails spoofing your domain"
• Set action for detected spoofing: quarantine or move to spam with warning banner
• Apply settings to all organizational units or specific high-risk groups

Step 2: Enable Enhanced Pre-Delivery Scanning

• In Safety settings, enable "Enhanced pre-delivery message scanning"
• This adds additional delay (seconds) to scan messages more thoroughly
• Configure to detect phishing attempts that evade initial filters
• Enable "Identify links behind shortened URLs"
• Enable "Scan linked images" for image-based phishing detection

Step 3: Configure Attachment Protection

• Enable "Protect against encrypted attachments from untrusted senders"
• Enable "Protect against attachments with scripts from untrusted senders"
• Enable "Protect against anomalous attachment types in emails"
• Configure action: warn users, move to spam, or quarantine
• Create exceptions for known legitimate encrypted file senders

Step 4: Enable Enhanced Safe Browsing

• Navigate to Admin Console > Security > Gmail Enhanced Safe Browsing
• Enable Enhanced Safe Browsing for the organization (off by default)
• This provides real-time protection against phishing URLs in emails
• Configure at organizational unit level for phased rollout
• Monitor user feedback for false positive impact

Step 5: Enroll High-Risk Users in Advanced Protection Program

• Identify high-privilege accounts: super admins, executives, finance leadership
• Enroll users in Google's Advanced Protection Program (APP)
• APP requires FIDO2 security keys for authentication
• APP blocks third-party app access unless explicitly approved
• APP provides enhanced scanning for Gmail and Drive downloads

Step 6: Configure Email Authentication

• Publish SPF record: v=spf1 include:_spf.google.com ~all
• Enable DKIM signing in Admin Console > Apps > Google Workspace > Gmail > Authenticate email
• Configure DMARC with monitoring: v=DMARC1; p=none; rua=mailto:dmarc@company.com
• Progress DMARC to enforcement per organizational readiness

Tools & Resources

• Google Admin Console: Central management for all security settings
• Google Workspace Security Investigation Tool: Threat analysis and response
• Google Security Center: Security health recommendations and dashboard
• Gmail Security Sandbox: Attachment detonation for enterprise licenses
• Google Advanced Protection Program: Strongest account security

Validation

• Spoofing protection blocks test email with lookalike domain
• Pre-delivery scanning catches test phishing with delayed weaponization
• Attachment protection warns on test encrypted attachment
• Enhanced Safe Browsing blocks known phishing URL clicked in email
• APP-enrolled accounts reject non-FIDO2 authentication attempts
• SPF, DKIM, DMARC all pass for outbound messages

Other files in this skill

• LICENSE
• assets/template.md
• references/api-reference.md
• references/standards.md
• references/workflows.md
• scripts/agent.py
• scripts/process.py

assets/template.md (verbatim)

Google Workspace Phishing Protection Configuration Template

Safety Settings Checklist

• Domain spoofing protection enabled
• Employee name spoofing protection enabled
• Enhanced pre-delivery scanning enabled
• Encrypted attachment protection enabled
• Script attachment protection enabled
• Anomalous attachment type protection enabled
• Enhanced Safe Browsing enabled
• Security Sandbox enabled (Enterprise)

Advanced Protection Program Enrollment

Authentication Configuration

references/api-reference.md (verbatim)

API Reference: Implementing Google Workspace Phishing Protection

Admin Console Path

Admin Console > Apps > Google Workspace > Gmail > Safety

Gmail Safety Controls

Admin SDK Directory API (GAM)

# List Gmail settings
gam print gmailsettings domain example.com
# List users with Advanced Protection
gam print users query "isAdvancedProtectionProgram=true"

Google Workspace Alert Center API

from google.oauth2 import service_account
from googleapiclient.discovery import build
creds = service_account.Credentials.from_service_account_file("sa.json",
    scopes=["https://www.googleapis.com/auth/apps.alerts"])
service = build("alertcenter", "v1beta1", credentials=creds)
alerts = service.alerts().list().execute()

Recommended Actions for Spoofing

References

• Google Workspace Admin Help - Phishing: https://support.google.com/a/answer/9157861
• Advanced Protection Program: https://landing.google.com/advancedprotection/
• Gmail Safety Settings: https://support.google.com/a/answer/7380368

references/standards.md (verbatim)

Standards & References: Google Workspace Phishing Protection

Google Workspace Security Settings Path

• Admin Console > Apps > Google Workspace > Gmail > Safety
• Admin Console > Security > Gmail Enhanced Safe Browsing
• Admin Console > Apps > Google Workspace > Gmail > Authenticate email

MITRE ATT&CK References

• T1566.001: Phishing: Spearphishing Attachment
• T1566.002: Phishing: Spearphishing Link
• T1656: Impersonation
• T1586.002: Compromise Accounts: Email Accounts

Key Protection Settings

Google Workspace License Requirements

references/workflows.md (verbatim)

Workflows: Google Workspace Phishing Protection

Workflow 1: Gmail Inbound Protection Pipeline

Inbound email arrives at Gmail
  |
  v
[Connection-level checks]
  +-- IP reputation
  +-- SPF validation
  +-- DKIM verification
  +-- DMARC evaluation
  |
  v
[Enhanced Pre-Delivery Scanning]
  +-- Content analysis for phishing indicators
  +-- URL expansion (shortened URLs)
  +-- Image scanning for embedded phishing
  +-- NLP analysis for social engineering
  |
  v
[Attachment Protection]
  +-- File type analysis
  +-- Script detection in attachments
  +-- Encrypted attachment from untrusted sender check
  +-- Security Sandbox detonation (Enterprise)
  |
  v
[Spoofing Detection]
  +-- Domain name similarity check
  +-- Employee name impersonation check
  +-- Internal domain spoofing check
  |
  v
[Delivery decision]
  +-- DELIVER: Clean message to inbox
  +-- WARN: Deliver with yellow warning banner
  +-- SPAM: Route to spam folder
  +-- QUARANTINE: Hold for admin review
  +-- REJECT: Block delivery entirely

Workflow 2: Safe Browsing URL Protection

User clicks URL in Gmail
  |
  v
[Enhanced Safe Browsing check]
  +-- Real-time URL reputation lookup
  +-- Check against known phishing database
  +-- Dynamic page analysis
  |
  v
[Decision]
  +-- SAFE: Allow navigation
  +-- DANGEROUS: Display full-page warning
  +-- SUSPICIOUS: Display interstitial warning

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