How to prevent business email compromise

Source: How to prevent business email compromise | CSO Online

Author: unknown

URL: https://www.huntress.com/business-email-compromise-guide/how-to-prevent-business-email-compromise

ONE SENTENCE SUMMARY:

Business email compromise uses targeted social engineering to steal money or data, countered by MFA, verification workflows, monitoring, training, and incident response.

MAIN POINTS:

  1. BEC relies on persuasion, not malware, making it harder for scanners to catch.
  2. Attackers research staff and processes, sometimes hijacking vendor threads to blend in.
  3. Common lures include fake invoices, “CEO” urgency, and payroll or bank-detail changes.
  4. Absence of links/attachments shifts defense toward identity controls and human verification.
  5. Enforcing MFA blocks most credential-stuffing attempts targeting email accounts.
  6. DMARC, DKIM, and SPF checks reduce spoofing; block look-alike domains and mismatched reply-to.
  7. Continuous security awareness training and simulations improve reporting and reduce successful replies.
  8. Dual-approval thresholds for wire transfers prevent single-user mistakes from causing losses.
  9. Help desk must use out-of-band identity proofing before resets to stop impersonation.
  10. Detection hinges on anomalies: odd timing, payment reroutes, risky mailbox rules, and impossible-travel logins.

TAKEAWAYS:

  1. Prioritize layered defenses because one convincing email can trigger massive financial loss.
  2. Build “verify before you pay” procedures into finance and vendor-management workflows.
  3. Monitor identity and mailbox behaviors continuously to catch takeovers early.
  4. Maintain a rapid BEC playbook: recall funds, secure accounts, preserve logs, investigate endpoints.
  5. Combine ITDR, awareness training, and EDR for prevention, detection, and containment across the attack chain.