A Boston accounting firm receives an email from a longtime vendor. The invoice looks right, the tone is familiar, and the request is routine – just updated bank details for the next payment. They wire $47,000. By the time anyone realizes the invoice was fake, the money is already long gone.
Business email compromise has quietly become the most expensive cyber threat facing organizations today. The FBI’s 2024 Internet Crime Report recorded nearly $2.8 billion in BEC losses alone – making it the second costliest cybercrime category and far exceeding reported ransomware losses. And while headlines focus on large-scale breaches, it’s small and mid-sized businesses that take the hardest hit relative to their size.
For businesses across Boston, where professional services, finance, and healthcare dominate the landscape, BEC isn’t a distant risk – it’s an active one. A 2025 report from security vendor Barracuda found that 78% of respondents had experienced an email security breach in the previous 12 months, 24% of which were business email compromise attacks.
How BEC Attacks Work
Business email compromise isn’t the clumsy phishing of the past, where you receive an email from an obviously fake address that’s poorly written and demanding a questionable payment. Instead, these emails often pass straight through security filters because there’s nothing technically malicious to detect.
What makes BEC effective is research and timing. Attackers study their targets – your vendor relationships, your internal hierarchy, your payment cycles – then strike when the request will seem routine.
Vendor invoice fraud: A supplier you’ve worked with for years sends an invoice with “updated” bank details. The email address looks right. The invoice format matches previous ones. The only difference is where the money ends up.
Executive impersonation: A message appearing to come from the CEO lands in a finance manager’s inbox. It’s marked urgent, requests discretion, and asks for an immediate wire transfer.
Payroll redirect: HR receives what looks like an employee request to change their direct deposit details. The email comes from an address that’s one character off.
Why Boston Businesses Are Prime Targets
Boston’s business landscape creates ideal conditions for BEC. The region’s concentration of professional services firms, financial advisors, and healthcare organizations means high-value transactions are routine. Attackers know that a request from a “law firm” or “financial consultant” carries weight here.
There’s also the supply chain factor. Many Boston SMBs serve as vendors or partners to larger enterprise clients – and that relationship becomes a target. Compromise a smaller firm’s email, and you gain a trusted channel into bigger organizations.
For cybersecurity in Boston, this is the reality that local businesses navigate every day.
The Warning Signs Your Team Needs to Recognize
BEC succeeds because the emails look legitimate. But there are patterns your team can learn to spot.
Urgency without context: A request to “handle this before the end of day” with no prior conversation. Pressure to act fast is designed to short-circuit the pause-and-check response.
Subtle email variations: The address reads @company-inc.com instead of @company.com, or a lowercase ‘L’ replaces an ‘I’. Close enough to pass a quick glance.
Payment detail changes: Any request to update bank account or direct deposit information – especially when it arrives by email alone.
Requests that bypass process: Language like “keep this between us” or “don’t verify with anyone else” is a red flag, regardless of who appears to be asking.
Something feels off: Trust that instinct. If the tone or phrasing doesn’t quite match the person you know, it’s worth a second look.
Practical Defenses Against BEC
The solution for BEC protection isn’t as simple as just buying more software. It’s about layering technical controls with smart processes and combining that with a team that knows what to look for.
Technical foundations: Multi-factor authentication on all email accounts is non-negotiable – it adds another protective layer that slows down or stops attackers even if credentials are compromised. Email authentication protocols (DMARC, SPF, and DKIM) make it harder to spoof your domain and help receiving servers identify fraudulent messages. External sender warnings add a visual flag to emails originating outside your organization, prompting staff to take a second look before acting.
Process controls: Require out-of-band verification for any financial request – a phone call to a known number, not the one provided in the email. Set approval thresholds so no single person can authorize large payments alone. Document your standard payment procedures so that deviations are obvious, and make sure every team member knows who to contact when something seems off.
Human controls: Short, regular awareness training beats annual marathons that everyone forgets by the following week. Share real examples of BEC attempts – anonymized if needed – so the threat feels tangible. It’s also important to build a blame-free reporting culture. The faster someone speaks up about a potential mistake, the faster you can act. Quick reporting helps to limit the damage, whereas punishing honesty makes your employees more reluctant to speak up in the future.
What to Do If You Suspect an Attack
If something feels wrong, it’s critical that you act quickly.
Don’t respond to the suspicious email. Verify independently by contacting the supposed sender through a known channel – a phone number you already have, not one provided in the message. Alert your IT team or provider immediately; time matters.
If money has already moved, contact your bank as soon as possible. Recovery chances drop fast once funds clear. Preserve the email chain as evidence – don’t delete anything.
This is where having an IT partner who already knows your business makes a difference. When you’re not starting from scratch explaining your systems and processes, response times shrink.
Protect Your Business Before the Next Email Lands
BEC targets the everyday – the routine invoice, the familiar request, the trusted relationship. There’s no malware to detect or obvious red flags to trigger your spam filter. Just a well-crafted email that looks like business as usual.
Defending against it takes the right mix of technology, process, and awareness. MFA and email authentication provide a technical foundation. Clear verification procedures close the gaps that attackers exploit. And a team that knows what to look for – and feels safe reporting concerns – is your last and often most effective line of defense.
SecureWon works with businesses across Boston to build cybersecurity that fits how you actually operate. From email security and authentication protocols to staff awareness training and incident response planning, we help you put the right protections in place before an attack tests them. If you’re not sure whether your current setup would catch a BEC attempt, book a call with our expert, Craig, to talk through what’s working, what’s missing, and where to focus first.
