Know the red flags: Business email compromise signs to look out for

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The Modern Attacker Playbook
Huntress examines real-world BEC scams, endpoint vulnerabilities, and ransomware tactics, along with proven defenses that help organizations stay one step ahead.
Sponsored by Huntress
Know the red flags: Business email compromise signs to look out for
BrandPost By Huntress
24 Feb 2026 8 mins
Protect your organization with strong tech tools and regular employee training on spotting BEC scams.
Credit: Shutterstock
When it comes to cyber threats, business email compromise (BEC) is one of the sneakiest, most costly scams out there. These digital predators dont rely on brute force, but are patient, tactical, and they exploit one weakness above all: human trust.
If youre in the cybersecurity game, spotting a BEC attack can mean the difference between an average Tuesday and a financial disaster. And if youre wondering, What are some identifiers of a BEC attack? think less about firewalls and more about finesse. These scams sweet-talk their way in.
BEC tactics are getting sharper every day, making detection feel like finding a needle in a haystack. But dont sweat it because with the right moves, those red flags wont stand a chance.
The anatomy of BEC: What to look out for
The FBI dropped a bombshell: BEC attacks cost companies over $43 billion globally between 2016 and 2022 . Yeah, you read that right … billion. These arent just stats on a spreadsheet. These represent real businesses getting blindsided by a single email. Lets talk about the telltale signs that could save you from becoming a victim.
Suspicious sender behavior
First rule of thumb: dont trust just the name in the From field. BEC attackers are experts in domain spoofing, so theyll make the email look like its from a legit source. Heres what to look for:
Domain tweaks: Attackers might change a single character in a domain. Think bank.com versus b8nk.com.
Display name tricks: You might see CEO Janet Smith pop up, but when you check the email address, its off by a mile.
Reply-to changes: If you hit reply and the response goes to some strange email address, you might be walking into a trap.
Fresh domains: If a domain was registered in the last 30 days, raise an eyebrow.
Timing and contextual red flags
Business email compromise detection isnt a high-tech magic trick. These scammers dont just wing it. They strike when youre most vulnerable. Thats why timing and context matter big time. Watch for these red flags:
Urgent requests: Act now! Wire transfer must be made immediately! If an email is pushing you to do something in a hurry, slow down.
CEO authority: If the email says the CEO needs this right now or Im unavailable by phone, be suspicious. Its a classic trick.
Off-hours chaos: Getting emails at 2 AM asking for large sums of money? Thats a red flag.
Breaking standard procedures: If the process to approve payments or changes gets bypassed, dont just approve. Double-check.
Linguistic and stylistic warning signs
If you want to detect BEC attacks, youve got to think like a con artist and read between the lines. These scams dont always scream fraud at first glance. Sometimes, the giveaway is buried in the tone, the grammar, or a weird word choice that just doesnt sit right. Keep your eyes peeled for:
Grammatical errors: Your CEO wouldnt send an email that had typos, spelling errors, or weird phrasing.
Tone shifts: If the way someone writes suddenly changes, thats not normal.
Overuse of authority: Excessive language like This is urgent! or Dont tell anyone about this is a hallmark of BEC attacks.
Cultural misalignment: If the phrasing doesnt match the senders typical style, its worth investigating.
Technical indicators: The hidden signs
If youre diving deep into BEC detection, sometimes its the hidden metadata that will spill the beans.
Email header inspection: Look at the emails behind-the-scenes info (headers). If something doesnt add up, like a mismatch in SPF/DKIM records, a weird server route, or an IP address that doesnt match where its supposed to come from, call BS.
Account behavior: If someone suddenly logs in from a new country or tries to access their account in the middle of the night, thats a problem. Likewise, any weird forwarding rules in an inbox could mean an attacker is hijacking the account.
Common BEC scenarios and how to spot them
BEC attacks come in all shapes and sizes. But here are a few classic setups thatll help you identify them faster.
CEO fraud source
This is the granddaddy of BEC scams. The attacker impersonates the CEO or high-ranking exec and pressures the target into making financial transactions.
Red flags: Requests to wire funds quickly, subtle email address changes, or CEO unavailable by phone messages.
Vendor fraud
Here, attackers spoof vendor emails to get you to pay them instead of your regular supplier.
Red flags: Sudden requests to change payment details or new contacts claiming to represent a trusted vendor.
HR and employee targeting
BEC isnt always about money. Sometimes, attackers are after sensitive employee info.
Red flags: Requests for direct deposit changes or compensation info.
When people talk about spoofed emails, theyre usually talking about one of two things: Real spoofing is when the from email address actually shows up as someone you know or trust, even though the message didnt really come from them (this is very difficult to detect). On the other hand, if the attacker is only spoofing the display name (like just setting it to jane@yourbank.com or Jane Smith), its notably easier. Thats often called display name spoofing.
Gearing up for the BEC battle
Okay, so how do you fight back? You need a defense plan thats got the chops to deal with this stuff. Heres how:
Tech armor
DMARC, SPF, and DKIM: These email authentication protocols are the first line of defense. They tell you whether an email really came from the person it says it did.
AI-powered filters: Use advanced email filters that analyze patterns and flag suspicious messages.
Multi-factor authentication: Ensure email accounts are protected with more than just a password.
Endpoint protection: Stop credential harvesting before it starts with Huntress managed detection, investigation, and response for your endpoints.
Human armor
Phishing simulations: Run mock BEC attacks to see how your employees react. You can either run them on your own or have Huntress fully manage them for you.
Security training: Train everyone, but especially those in high-risk departments (Finance, HR, IT), on spotting these attacks. Huntress Managed Security Awareness Training is loved by learners and hated by hackers.
Verification culture: Make it standard practice to verify any financial transactions or requests through a secondary communication channel.
Process arm…

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