Preventing Business Email Compromise (BEC): The Executive Defense Playbook
Stopping executive impersonation, fraudulent banking invoice redirection, and unauthorized corporate wire transfers.
Fintech Architecture Lead
Principal Digital Payments Architect, Natelad Agency
Executive & Architectural Key Takeaways
- ✓BEC attacks do not use malware; they use psychological urgency and lookalike domains (e.g., company-ltd.com instead of company.com).
- ✓Finance teams must enforce mandatory verbal out-of-band verification on known phone numbers before processing any bank account change.
- ✓Implement mail transport rules in Google Workspace or Exchange that flag external emails pretending to have executive display names.
- ✓Disable legacy POP3/IMAP protocols and enforce hardware FIDO2 passkeys for all accounting and executive mailboxes.
- 01.How Sophisticated Wire Fraud Attacks Unfold
- 02.Mandatory Internal Controls & Dual Authorization
- 03.Mail Server Rule for Lookalike Display Names
How Sophisticated Wire Fraud Attacks Unfold
An attacker registers a domain that differs by one character from your primary supplier. They send a professionally formatted email stating: "Our bank account has changed due to an annual audit; please remit outstanding balances to this new account." Without rigorous verification controls, finance teams wire hundreds of thousands of dollars directly into criminal accounts.
Mandatory Internal Controls & Dual Authorization
Establish a strict corporate policy: No payment above $2,500 can be processed by a single individual. All wire transfers require two separate authorized executive signatures and independent phone confirmation.
Mail Server Rule for Lookalike Display Names
Configure your mail exchange to automatically inject an eye-catching warning banner on any incoming email where the sender display name matches an executive but originates from an external domain.
Fintech Architecture Lead
Principal Digital Payments Architect at Natelad Agency. Architecting mission-critical digital systems, resilient infrastructure, and security frameworks for enterprises worldwide.
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