An email lands on a Tuesday morning.
It appears to come from the CEO. The name is correct. The wording sounds convincing. Even the signature seems authentic.
"Hey — can you help me with something quickly? I'm stuck in back-to-back meetings. I need you to take care of a vendor payment. I'll fill you in later."
The new hire hesitates.
They've only been at the company for four days. They're still learning the workflow. They don't yet know what's typical, and they definitely don't want to be the person who challenges the CEO during their first week.
So they do what seems helpful and move forward.
And just like that, the attack succeeds.
Why the first week is the most vulnerable
Every spring, companies welcome a fresh group of employees, many of them recent graduates and summer interns starting their first professional roles. For organizations, it's onboarding season. For attackers, it's an open invitation.
Keepnet Lab's 2025 New Hires Phishing Susceptibility Report found that CEO impersonation emails are 45% more likely to work on new hires than on experienced employees.
Cybercriminals usually don't target your most experienced staff first. They focus on people who are still learning the environment, because the early days are filled with uncertainty and unfamiliar processes.
A new employee doesn't yet know what a legitimate request looks like. They don't understand how the CEO normally communicates. They haven't had time to build confidence or instinct, and attackers exploit that gap.
But the real issue isn't the new hire. The biggest risk isn't a careless employee. It's the one who wants to be helpful.
If you lead a business, you probably already know exactly which team member would respond first.
The real gap isn't training. It's the system.
Think back to that employee's first day.
The laptop wasn't ready. Access wasn't fully provisioned. The email account was still being created. They borrowed another person's login to get something done quickly. They stored a file locally because the shared drive wasn't available. They used a personal phone to look up a client number because it was faster.
None of that felt dangerous. It felt practical. It felt like the fastest way to survive a busy first day.
But during that first week, before everything is fully in place, critical risks build quietly. Shared credentials create untracked accounts, files slip outside backup coverage, personal devices touch company data, and nobody explains what to do when something feels suspicious.
The same Keepnet report found that new employees are 44% more likely to fall for phishing than tenured staff. That difference isn't caused by carelessness. It's caused by disorder. When onboarding is messy, security becomes an afterthought. That's the environment the phishing email is designed to exploit.
The attack didn't create the weakness. The first day did.
What a secure first day should look like
Solving this doesn't require a long security lecture on day one. It requires three things to be ready before the new employee arrives.
1. Their access is set up properly, not patched together.
The laptop should be ready, credentials should be created, and permissions should be clearly defined. No borrowed logins, no temporary fixes, and no "we'll handle that later this week."
2. They understand what normal communication looks like in your business.
This can be a fast 10-minute conversation. Does the CEO ever email about payments? Does anyone? What should they do when something feels unusual? This isn't formal security training; it's practical orientation.
3. They know exactly where to go with questions.
The employee who paused before opening that email probably would have checked with someone if they'd known who to ask. Most first-week mistakes happen quietly because new hires don't want to look inexperienced.
Give them a person. Give them a process.
Most security mistakes don't happen because someone ignores the rules. They happen because no one has explained the rules yet.
Maybe your onboarding is already strong. Maybe your team is small enough that first days feel more personal than procedural. But if you've ever had a new hire improvise their way through week one — or if you're planning to add someone this spring — it's worth addressing it before that Tuesday email arrives.
Click here or give us a call at 609-676-3597 to schedule your free 15-Minute Discovery Call.
And if you know another business owner who is hiring soon, share this with them. The smartest time to secure that door is before anyone tries it.
