The message lands on a Tuesday morning.
It appears to come from the CEO. The name is correct. The wording 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. Everything is still unfamiliar. They don't yet know what's standard, and the last thing they want is to challenge 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
Each spring, companies welcome a new group of recent graduates and summer interns into their first jobs. For businesses, that's onboarding season. For cybercriminals, it's open 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.
Attackers don't target your most seasoned employees first. They focus on the people still learning the basics, because early on, everything feels uncertain and unfamiliar.
A new employee doesn't yet know what a routine request looks like. They don't understand how the CEO normally communicates. They haven't had time to build judgment or confidence, and criminals exploit that lack of context.
But the real issue isn't the new hire. The biggest risk isn't the person who isn't paying attention. It's the one who wants to be helpful.
If you lead a team, you probably already know exactly who would reply first.
The problem isn't just training. It's the process.
Now go back to that employee's first day.
The laptop wasn't fully set up. Access was still pending. The email account wasn't ready yet. They borrowed a coworker's login to check something fast. They saved a document locally because the shared drive wasn't available. They used their personal phone to find a client number because it was quicker.
None of it seemed unsafe. It felt practical. Efficient. Like the right way to survive a chaotic first day.
But during that first week, before everything is properly in place, small problems pile up: shared credentials create untracked access, files fall outside backup systems, personal devices touch company data, and no one has explained what to do when something seems suspicious.
According to the same Keepnet report, new employees are 44% more likely to fall for phishing than tenured staff. That difference isn't about recklessness. It's about disorder. When onboarding is messy, security gets treated like an afterthought. That's exactly the environment a phishing email needs.
The attack didn't invent the weakness. Day one did.
What a secure first day should include
Solving this doesn't require a long lecture about cybersecurity on day one. It requires three essentials to be ready before the person ever arrives.
1. Their access is set up in advance, not improvised.
The laptop should be ready, credentials should already exist, and permissions should be clearly defined. No shared logins, no temporary fixes, and no "we'll handle it later this week."
2. They understand what normal communication 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 feels unusual? This isn't formal security training — it's basic orientation.
3. They have a safe place to ask questions.
The employee who paused before clicking that email might have asked someone if they knew who to contact. Many first-week mistakes stay hidden because new hires don't want to look 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 explained the rules yet.
Maybe your onboarding is already strong. Maybe your team is small enough that first days feel personal instead of procedural. But if you've ever had a new hire improvise through week one — or if you're preparing to bring someone in this spring — it's worth reviewing the process before that Tuesday email shows up.
Click here or give us a call at (619) 349-5850 to schedule your free 15-Minute Discovery Call.
And if you know another business owner who's about to hire, pass this along. The best time to secure the door is before someone tries it.
