Business Email Compromise: When Attackers Pretend to Be Someone You Trust
by Daniil Slesarenko
What Is Business Email Compromise?
Business Email Compromise (BEC) is a type of cyberattack where criminals impersonate a trusted person or organization to convince someone to send money, share sensitive information, or perform another action that benefits the attacker.
Unlike many phishing attacks that are sent to thousands of people, BEC attacks are often highly targeted. Attackers may research a company, its employees, vendors, and business relationships before creating a convincing message. The email may appear to come from a manager, executive, customer, or supplier the recipient already knows.
The goal is not necessarily to break into a system. Sometimes, the attacker simply needs the victim to believe that a legitimate request has been made.
How Business Email Compromise Works
A successful BEC attack often begins with information gathering. Attackers can use company websites, social media, leaked credentials, and previously compromised accounts to understand how an organization operates.
They may look for:
Company leadership and employee roles
Email addresses and communication patterns
Vendors and business partners
Upcoming projects or transactions
Information about who approves payments
Once they understand the organization, attackers can create messages that fit naturally into normal business activity.
Common BEC Scenarios
BEC attacks often involve requests that seem routine but require the recipient to take an important action. An attacker might impersonate a company executive and request an urgent payment, or pretend to be a supplier asking for banking information to be changed.
Other examples include:
A fake executive requesting an urgent wire transfer
A fraudulent invoice from a trusted vendor
A request to change a supplier's payment information
An attacker impersonating an employee to obtain sensitive documents
A compromised email account sending fraudulent requests to coworkers or customers
Because these requests can look completely legitimate, traditional spam filters may not prevent them.
Why These Attacks Are So Effective
The biggest weakness BEC attacks exploit is trust.
Employees are expected to respond to their managers, process invoices, communicate with suppliers, and complete financial requests. Attackers take advantage of these normal business processes and add urgency to prevent people from stopping to verify the request.
A message saying that a payment needs to be completed immediately or that a confidential document is needed before a meeting creates pressure to act first and question later.
How to Protect Your Organization
Technology can help identify suspicious messages, but preventing BEC also requires good business processes. Employees should know that unusual requests involving money, credentials, or sensitive information deserve additional verification.
Organizations can reduce their risk by:
Verifying unusual payment requests through a separate communication channel
Confirming changes to vendor banking information directly with the vendor
Using multi-factor authentication on business accounts
Training employees to recognize impersonation attempts
Establishing clear approval processes for financial transactions
A quick phone call or separate message can prevent a convincing email from turning into a costly incident.
Don't Let Trust Become a Vulnerability
Business Email Compromise demonstrates that cybersecurity is not only about protecting computers and networks. Attackers can exploit relationships, business processes, and trust to achieve their goals.
The most convincing fraudulent message may look completely normal. That is why unusual requests should be verified even when they appear to come from someone you know and trust.