Vendor Email Compromise Is Rising: What Employers Need to Know to Reduce Risk

Unlike traditional Business Email Compromise (BEC), where attackers often pretend to be executives or internal leaders, VEC attacks focus on external partners: vendors, suppliers, and service providers your team already works with regularly.

The goal of these attackers is simple:

- Divert payments

- Steal sensitive information

- Gain access to systems

- Disrupt operations

And because the communication looks normal, even experienced employees can fall for it.

Why are VEC Attacks so Hard to Detect?

Most employees have learned to spot obvious phishing attempts. Generic greetings, suspicious links, bad grammar, those red flags are familiar.

VEC attacks don’t use them.

Instead, attackers mirror real vendor conversations:

- Correct email addresses or compromised accounts

- Familiar tone and formatting

- Timing that aligns with payment cycles

- Requests that sound routine, not urgent

In many cases, organizations don’t realize they’ve been targeted until a payment doesn’t arrive where it should, or sensitive data is already in the wrong hands.

How a Typical VEC Attack Unfolds

VEC attacks are deliberate and patient. Here’s how they usually happen:

1. Initial Compromise

Attackers gain access to a vendor’s email account through phishing, credential stuffing, or by using look-alike domains that closely resemble legitimate vendor addresses.

2. Reconnaissance

Once inside, attackers quietly observe. Over weeks or months, they study email threads, payment schedules, approval workflows, and who signs off on financial decisions.

3. Silent Monitoring

Forwarding rules are often set up so attackers receive copies of incoming and outgoing emails, allowing them to gather even more information without raising suspicion.

4. Execution

When the timing is right, attackers send highly targeted emails, often requesting updated banking details, invoice changes, or credential verification, using language that perfectly matches prior communications.

At that point, the request doesn’t feel suspicious. It feels expected.

The Real Business Impact of VEC Attacks

The damage from a VEC attack goes far beyond a single fraudulent payment.

Organizations may face:

- Financial losses from diverted funds

- Supply chain disruptions

- Exposure of employee or customer data

- Regulatory scrutiny and potential fines

- Legal action from affected partners

- Long-term reputational damage

For vendors, the consequences can be even more severe. Clients may leave, contracts may be lost, and trust built over years can disappear overnight.

How Employers Can Reduce VEC Risk

There’s no single fix, but a layered approach can dramatically reduce risk.

1. Strengthen Email Authentication: SPF, DKIM, and DMARC verify sender identity and block spoofed domains, though they’re not enough on their own.

2. Use Behavioral Monitoring: AI tools can flag unusual requests or changes in vendor communication patterns.

3. Verify Vendor Requests: Any request involving money, banking changes, or sensitive data should be confirmed through a second channel, like a secure portal or phone call.

4. Monitor Vendor Security: Assess whether partners have experienced breaches or lack adequate security controls.

5. Train Employees on VEC: Role-specific, scenario-based training helps staff recognize real-world attacks and know when to pause and verify.

The most effective defenses combine technology, process, and human awareness.

The Bottom Line

Vendor email compromise doesn’t succeed because organizations are careless, it succeeds because trust-based processes weren’t built to handle deception at scale.

Organizations that proactively strengthen vendor controls, verify sensitive requests, train employees on real-world VEC scenarios, and align security with operations are far better positioned to reduce financial loss and disruption.

Brand’s Payroll helps manage vendor risk where it matters most: at the intersection of payroll, employee data, and financial workflows. We help employers protect sensitive information, reduce exposure, and maintain confidence across their workforce and vendor relationships.