An email lands on a Tuesday morning.
It appears to come from the CEO. The sender name checks out. The wording feels authentic. Even the signature seems legitimate.
"Hey — can you jump on something for me real quick? I'm tied up in meetings all morning. I need you to take care of a vendor payment. I'll fill you in later."
The new hire hesitates.
They've only been on the job for four days. They're still learning the company's rhythms. They don't yet know what's normal, and they definitely don't want to be the person who challenges the CEO in week one.
So they comply.
And in a matter of seconds, the breach is underway.
Why the first week is the easiest week to exploit
Every spring, organizations welcome a fresh round of employees, including recent graduates and summer interns entering their first professional roles. For leadership, it's onboarding season. For cybercriminals, it's prime opportunity.
Keepnet Lab's 2025 New Hires Phishing Susceptibility Report found that CEO impersonation emails are 45% more likely to succeed with new hires than with experienced employees.
Attackers don't usually target your most experienced team members. They focus on people still trying to understand the culture, because the opening days create a zone where everything is unfamiliar and confidence is still forming.
A new employee may not know what a routine request looks like. They may not know how the CEO normally communicates. They haven't had time to build instincts or confidence yet, and criminals count on that uncertainty.
But the real issue isn't the new hire. The most vulnerable employee isn't the one who's careless; it's the one who's trying too hard to be helpful.
If you manage a business, you probably already know exactly who on your team would answer first.
The problem usually isn't awareness. It's the process.
Think back to that person's first day.
The laptop wasn't ready. Access hadn't been fully provisioned. The email account was still being set up. They used someone else's login to check one thing quickly. They saved a file on their device because the shared drive wasn't available. They pulled up a client number on a personal phone because it was faster.
None of it seemed dangerous. It just felt efficient, practical, and necessary on a hectic first day.
But in that first week, while the basics are still being assembled, a few critical risks quietly take shape. Shared credentials create untracked accounts, files drift outside backup protection, personal devices begin handling business data, and no one clearly explains what to do when something seems suspicious.
According to the same Keepnet report, new employees are 44% more susceptible to phishing than tenured staff. That gap isn't caused by recklessness. It's caused by disorder. When onboarding is messy, security becomes an afterthought. That's exactly the environment a phishing email is built for.
The attack didn't create the weakness. The first day did.
What a secure first day should look like
Closing this gap doesn't require a marathon security session on day one. It means making sure three essentials are in place before the employee arrives.
1. Their access is fully set up, not patched together.
That means the laptop is ready, credentials are created, and permissions are clearly assigned. No borrowed logins, no temporary fixes, and no "we'll handle it later this week."
2. They understand what normal requests look like in your company.
This can be a quick 10-minute conversation. Does the CEO ever email about payments? Does anyone? What should they do if something feels unusual? This isn't formal training; it's basic orientation.
3. They know exactly where to ask questions without embarrassment.
The employee who paused before clicking that email probably would have asked someone if they'd known who to contact. Most first-week mistakes happen quietly because new hires don't want to seem inexperienced.
Give them a person. Give them a clear process.
Most security failures 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 a new hire has ever had to improvise through week one — or if you're bringing someone on this spring — it's worth addressing now, before that Tuesday email shows up.
Click here or give us a call at 435-313-8132 to schedule your free 10-Minute Conversation.
And if you know another business owner who's about to hire, pass this along. The best time to secure the door is before anyone tries to walk through it.
