An email lands on a Tuesday morning.
It appears to be from the CEO. The sender name checks out. The voice sounds right. Even the signature feels authentic.
"Hey — can you help me with something quickly? I'm in back-to-back meetings. Need you to handle a vendor payment. I'll explain later."
The new hire hesitates.
They've only been there four days. They're still learning the workflow. They don't yet know what a normal request looks like, and they certainly don't want to be the person who challenges the CEO during their first week.
So they step in and do it.
And with that, the breach begins.
Why the first week creates the biggest risk
Each spring, organizations welcome a fresh group of employees, including recent graduates and summer interns starting their first jobs. For the business, it's onboarding. For criminals, it's a prime opportunity.
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.
Attackers don't always target your most seasoned team members. They focus on the people still learning the environment, because early on, everything is uncertain and nothing feels fully familiar.
A new employee may not know what a legitimate request looks like. They may not understand how the CEO usually communicates. They haven't built the instincts or confidence that come with time, and cybercriminals exploit that uncertainty.
But the issue isn't the new hire. The biggest risk is rarely the person who is careless. It's the person who is trying to help.
If you run a business, you probably already know who on your team would respond first.
The real weakness isn't training. It's the process.
Now go 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 get something done fast. They saved a document locally because the shared drive wasn't available. They used a personal phone to look up a client number because it was easier.
None of that seemed dangerous. It felt practical. It felt like solving problems on a hectic first day.
But during that first week, before everything is properly set up, small risks quietly stack up. Shared credentials create untracked accounts, files live outside your backup systems, personal devices touch business data, and nobody has clarified what to do when something seems suspicious.
The same Keepnet report also found that new employees are 44% more vulnerable to phishing than longer-tenured staff. That difference isn't caused by negligence. It's caused by disorder. When onboarding is messy, security becomes optional. That's exactly the kind of environment a phishing email is designed to exploit.
The attack didn't create the weakness. The first day did.
What a secure first day should include
Solving this does not require a long security lecture on day one. It requires three essentials to be in place before the new hire arrives.
1. Their access is ready, not improvised.
The laptop should be prepared, credentials should already exist, and permissions should be clearly assigned. No borrowed logins, no temporary fixes, and no "we'll handle it later this week."
2. They understand what a normal request looks 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 seems unusual? This isn't formal cybersecurity training; it's practical orientation.
3. They have a safe place to ask questions.
The employee who paused before clicking that email probably would have checked with someone if they knew who to ask. Many first-week mistakes happen silently because new hires don't want to look unsure.
Give them a person. Give them a clear process.
Most security mistakes happen not because someone ignores the rules, but because they haven't learned the rules yet.
Maybe your onboarding is already strong. Maybe your team is small enough that the first few days feel personal instead of procedural. But if you've ever had a new hire improvise through their first week — or if you're planning to bring someone on this spring — it's worth reviewing the process before that Tuesday email shows up.
Click here or give us a call at (573) 334-4439 to schedule your free No-Obligation Conversation.
And if you know another business owner who is about to hire, share this with them. The smartest time to secure the door is before anyone tries to open it.
