On a Tuesday morning, an email lands in the inbox.
It appears to be from the CEO. The sender name checks out. The wording feels right. Even the signature looks convincing.
"Hey — can you jump on something fast? I'm stuck in back-to-back meetings and need you to take care of a vendor payment. I'll fill you in later."
The new hire hesitates.
They've only been there four days. Everything is still unfamiliar. They don't yet know what a legitimate request looks like, and the last thing they want to do is question the CEO in their first week.
So they help.
And with that, the breach begins.
Why week one is the highest-risk window
Each spring, companies welcome a fresh group of employees, many of them recent graduates and summer interns starting their first professional roles. For your organization, it's onboarding. For criminals, it's open season.
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 staff.
Attackers don't usually target your most seasoned employees. They focus on the people still learning the culture, because the opening days create a dangerous gap where everything feels uncertain.
A new employee doesn't know what a routine request sounds like. They don't know how the CEO typically communicates. They haven't built the instincts or confidence that come with time, and cybercriminals count on that uncertainty.
But the new hire isn't the real issue. The biggest risk isn't the person making a mistake. It's the person who is trying hardest to be useful.
If you lead a team, you probably already know exactly who would reply first.
The real problem isn't awareness. It's readiness.
Think back to that employee's first day.
The laptop wasn't fully set up. Access was incomplete. The email account was still being provisioned. They borrowed a coworker's login to check something quickly. They saved a document locally because the shared drive wasn't available yet. They used their personal phone to look up a client number because it was faster.
None of it seemed dangerous. It just felt practical. Like getting through a busy first day any way they could.
But during that first week, before everything is fully configured, small risks quietly pile up. Shared credentials create accounts no one is tracking. Files land outside your backup systems. Personal devices touch company data. And no one has explained what to do when something feels wrong.
The same Keepnet report found that 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 to exploit.
The attack didn't invent the weakness. The first day exposed it.
What a secure first day should include
Solving this doesn't mean overwhelming new hires with a long security lecture. It means making three essentials ready before they ever walk in the door.
1. Their access is set up ahead of time, not figured out on the fly.
That means the laptop is ready, credentials are created, and permissions are clearly defined. No borrowed logins, no temporary fixes, and no "we'll handle that later this week."
2. They understand what a normal request looks like in your company.
This can be a fast, 10-minute conversation. Does the CEO ever email about payments? Does anyone? What should they do if something seems unusual? This isn't formal 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 asked someone if they knew who to ask. Most first-week mistakes stay hidden because new hires don't want to appear inexperienced.
Give them a contact. Give them a process.
Most security mistakes don't happen because someone refuses to follow the rules. They happen because no one has shown them the rules yet.
Maybe your onboarding is already strong. Maybe your team is small enough that the first few days feel more personal than procedural. But if a new hire has ever had to improvise through week one — or if you're preparing to bring someone on this spring — it's worth tightening the process before that Tuesday email shows up.
Click here or give us a call at 952-941-7333 to schedule your free Consult.
And if you know another business owner who's hiring soon, share this with them. The easiest time to lock the door is before anyone tries it.
