It lands in the inbox on a Tuesday morning.
The message appears to come from the CEO. The name checks out. The tone feels authentic. Even the signature looks right.
"Hey — can you help me with something quickly? I'm stuck in back-to-back meetings and need you to process a vendor payment. I'll explain later."
The new hire hesitates.
They've only been here four days. Everything is still new. They don't yet know what's standard, 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 just like that, the breach begins.
Why week one is the riskiest week
Every spring, companies welcome a fresh group of employees, including recent graduates and summer interns starting their first professional roles. For your business, it's onboarding season. For attackers, it's prime hunting season.
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 staff.
Cybercriminals don't target your most seasoned team members first. They focus on the people still learning the culture because the opening weeks are full of uncertainty, and uncertainty creates opportunity.
A new employee doesn't know what a routine request should sound like. They don't know how the CEO normally communicates. They haven't built the instincts, confidence, or context that seasoned employees rely on, and attackers count on that gap.
But here's the real issue: The biggest risk isn't the person who makes a mistake. It's the person trying too hard to be helpful.
If you manage a business, you probably already know who on your team would reply first.
The problem isn't just training. It's the setup.
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 a coworker's login to check one thing fast. They saved a file on their local device because they couldn't reach the shared drive. They used their personal phone to find a client number because it was quicker.
None of it seemed dangerous. It felt efficient. Practical. Like the right way to survive a busy first day.
But during week one, while everything is still being assembled, small problems quietly turn into big exposures. Shared logins leave accounts untracked, files slip outside backup coverage, personal devices touch company data, and nobody has explained what to do when something feels suspicious.
The same Keepnet report also showed that new employees are 44% more likely to fall for phishing than tenured staff. That difference isn't about negligence. It's about disorder. When onboarding is messy, security becomes an afterthought. That's exactly where the phishing email strikes.
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 marathon security session on day one. It takes three essentials being in place before the new hire arrives.
1. Their access is ready, not improvised.
That means the laptop is prepared, credentials are issued, and permissions are clearly mapped. No borrowed logins, no stopgap fixes, and no "we'll handle that later this week."
2. They understand what normal looks like in your company.
This can be a simple 10-minute conversation. Does the CEO ever email about payments? Who should they contact if something seems suspicious? What should they do before acting? This isn't heavy training; it's practical orientation.
3. They know exactly where to ask questions.
The employee who paused before clicking that email probably would have checked with someone if they'd known where to turn. Most first-week errors happen quietly because new hires don't want to appear inexperienced.
Give them a person. Give them a process.
Most security failures don't happen because someone ignores the rules. They happen because no one has learned them 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 watched a new hire improvise through week one — or you're planning to bring someone on this spring — it's worth addressing before that Tuesday email arrives.
Click here or give us a call at 816-256-2595 to schedule your free 15-Minute Discovery Call.
And if you know another business owner who's hiring soon, send this their way. The best defense is closing the door before anyone tries it.
