Global Marketing Company — Smishing Attack Leads to Major Breach

In 2023, a global marketing company—handling digital campaigns, data analytics, and creative delivery for Fortune 500 clients—suffered a devastating breach caused by something shockingly simple: a smishing attack.

Smishing (SMS phishing) might seem unsophisticated, but in this case, it led to the compromise of dozens of admin accounts, full access to sensitive marketing operations, and unauthorized access into client-facing systems.

It started with a fake SMS message sent to an employee who had administrator-level credentials for the agency’s shared infrastructure.

  • The SMS looked like a routine internal notification, prompting a login.
  • The employee entered their real credentials into a spoofed site.
  • The attacker immediately logged in and pivoted laterally through the infrastructure.

Due to:

  • Lack of MFA (Multi-Factor Authentication)
  • No IP restrictions on admin access
  • Flat network topology (no segmentation)
  • Shared hosting and shared CMS logins across multiple client sites

…the attacker gained access to:

  • Client campaign data
  • Live websites
  • Internal dashboards
  • Credentials stored in plaintext or exported browser files

Within hours, the attacker had administrative visibility across the company’s marketing automation stack.

This breach wasn’t caused by zero-days or exotic malware. It was a result of weak infrastructure governance and lack of preventative DevSecOps practices. Here’s what should’ve been in place:

FailingWhat They Should Have Done
No MFA on admin accountsEnforce mandatory MFA across all systems, especially for infrastructure and CMS logins
Flat internal networkUse network segmentation and role-based access control (RBAC) to limit lateral movement
Shared infrastructureIsolate each client environment using containers, subdomains, or staging/prod splits
No release processCI/CD pipelines should be in place to control releases with audit logs, rollback ability, and pre-prod scanning
Weak backup systemAir-gapped and automated backups with point-in-time recovery would have limited damage and reduced downtime

At Ijabat, we specialize in exactly this kind of high-risk infrastructure situation. Here’s how we would’ve stepped in—before the breach happened:

  • Move away from shared, flat environments to client-isolated containers or VPS setups.
  • Enforce least-privilege access rules, MFA, and secure SSH/public key login only.
  • Set up versioned, automated backups across databases, files, and critical systems.
  • Perform simulated recovery drills to ensure business continuity.
  • Build secure, audit-ready deployment pipelines for websites, marketing apps, and internal tooling.
  • Ensure no one pushes directly to production. Every deployment would go through approval, testing, and rollback safety.
  • Centralized logging of all infrastructure access, changes, and anomalies.
  • Real-time alerts for login attempts, especially from unknown geographies or devices.
  • Deploy realistic phishing tests quarterly.
  • Train teams to detect social engineering across SMS, email, and other comms.

The attack on this marketing agency wasn’t advanced. It was preventable.

If you run a marketing firm—or manage infrastructure for one—and haven’t recently audited your security posture, now is the time. Waiting until “after something happens” often means you’ve already lost client data, credibility, and uptime.

Let’s talk. We’ll assess your current setup, highlight risks, and design a modern, secure infrastructure tailored to how you work.