Project-based · Retail & Ecommerce

From Vulnerable to Secure: Strengthened Email Security & Brand Impersonation Protection

Transforming A.SHIMUS's email security posture to combat phishing and brand impersonation attacks.

A.SHIMUS faced serious threats from multiple phishing and brand impersonation attacks that impacted their brand image. Our engagement aimed to harden their email security by fixing DKIM configurations and analyzing past attack methods, resulting in robust protection against future incidents.

Client

A.SHIMUS

Industry

Retail & Ecommerce

Platform

Google Workspace, Shopify

Focus

Email security hardening and brand impersonation prevention

Google Workspace
Shopify

Improved email authentication reduced brand impersonation risks.

Enhanced security posture restored client confidence in email communications.

Clear actionable prevention plan established for future security engagements.

The Situation

Multiple successful phishing and impersonation attacks targeting customers and internal team members.

One incident resulted in ~$1,800 financial loss due to internal impersonation.

Attackers used sophisticated brand impersonation with precise timing after user signups.

Concerns around Shopify apps leaking data or enabling timing-based attacks.

What We Worked On

Email Authentication Overhaul

Fixed DKIM configuration by activating proper domain signing in Google Workspace and Shopify DNS.

Incident Analysis

Analyzed real phishing incidents and identified sophisticated attack methods, including display-name spoofing and lookalike domains.

Security Review

Reviewed Google Workspace and Shopify app security, focusing on email marketing tools used by the client.

Actionable Recommendations

Delivered a prioritized remediation checklist, findings report, and specific prevention recommendations tailored to observed attacks.

Outcomes

DKIM Status

Fully activated and passing on all legitimate emails

What Changed

Improved email authentication reduced brand impersonation risks.

Enhanced security posture restored client confidence in email communications.

Clear actionable prevention plan established for future security engagements.

In Their Words

The audit went beyond generic recommendations — they helped us truly understand how the attackers were timing their emails and impersonating our brand.

— A.SHIMUS

Worth Noting

Currently, A.SHIMUS has implemented our recommendations, reinforcing their email security and minimizing the risk of future attacks.

How can your organization enhance its email security?

We find the leaks. Then we fix them.

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