Business email compromise, commonly called BEC, is one of the most financially damaging forms of cybercrime. Unlike ransomware, BEC attacks often involve no malware at all. Instead, criminals use deception to convince employees to send money or sensitive information to the wrong place.
Because these scams rely on trust and routine business processes, they can be difficult to detect. The good news is that strong procedures can stop most BEC attempts before any money leaves your account.
How Business Email Compromise Works
BEC attacks typically follow one of several patterns:
Executive Impersonation
An attacker poses as a CEO, owner, or other senior leader and asks an employee to make an urgent payment, purchase gift cards, or send confidential information.
Vendor Invoice Fraud
Criminals impersonate a trusted vendor and send an invoice with updated banking details. The payment goes to an account controlled by the attacker.
Compromised Email Accounts
In more sophisticated attacks, criminals gain access to a real email account, often through phishing. They monitor conversations, learn how the business operates, and insert themselves into legitimate transactions at the right moment.
Payroll Diversion
An attacker poses as an employee and asks HR or payroll to update direct deposit information.
Real Estate and Closing Fraud
Businesses involved in property transactions may receive fraudulent wiring instructions that appear to come from a title company, attorney, or agent.
Why BEC Is So Effective
BEC messages often look completely legitimate. They may come from a real account, use accurate details about ongoing projects, and match the tone of previous conversations. Attackers also create pressure through urgency or confidentiality, discouraging employees from double-checking.
Warning Signs to Watch For
- Requests to change bank account or payment details
- Urgent payment requests, especially near deadlines or holidays
- Requests to bypass normal approval processes
- Instructions to keep a transaction confidential
- Slight changes in email addresses or domain names
- Unusual timing, such as requests sent while an executive is traveling
Controls That Stop BEC
Verify Payment Changes by Phone
This is one of the most effective protections. Any request to change banking information should be verified by calling the vendor or employee at a phone number already on file, not a number included in the email.
Require Dual Approval
Payments above a certain amount should require approval from more than one person. This creates an additional opportunity to catch fraud.
Enable Multi-Factor Authentication
MFA makes it much harder for attackers to take over email accounts, which prevents the most convincing type of BEC.
Strengthen Email Security
Advanced email filtering, external sender warnings, and email authentication records such as SPF, DKIM, and DMARC help identify and block spoofed messages.
Monitor for Suspicious Account Activity
Attackers who compromise an account often create mailbox rules to hide replies or forward messages. Monitoring for these changes and unusual login locations can reveal a compromise early.
Train Finance and Leadership Teams
Employees who handle payments, payroll, and sensitive data should receive targeted training on BEC tactics.
What to Do If You Suspect Fraud
Speed matters. If a fraudulent payment has been sent:
- Contact your bank immediately and request a recall of the transfer
- Report the incident to the FBI’s Internet Crime Complaint Center (IC3)
- Notify your IT or security provider to investigate possible account compromise
- Reset credentials and review email account rules and access
- Contact your cyber insurance provider
Protect Your Business From Costly Fraud
Business email compromise targets processes as much as technology. Combining strong verification procedures with modern email security significantly reduces the risk of a costly loss.
InfoSystems helps businesses secure email systems and build procedures that stop wire fraud. Contact us to strengthen your defenses.
