The message lands in the inbox on a Tuesday morning.
It appears to come from the CEO. The name is correct. The wording feels authentic. Even the signature looks convincing.
"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 here for four days. They're still learning the workflow. They don't yet know what's standard, and they definitely don't want to be the person who challenges the CEO during week one.
So they step in and help.
And in an instant, the attack succeeds.
Why week one is the highest-risk week
Each spring, organizations welcome a fresh group of employees, including recent graduates and summer interns starting their first professional roles. For companies, it'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 employees.
Threat actors don't target your most experienced staff first. They focus on people who are still figuring things out because the beginning is when everything feels unfamiliar and nothing feels certain.
A new employee doesn't know what a routine request looks like. They don't yet understand how the CEO normally communicates. They haven't had time to build instincts or confidence, and criminals exploit that uncertainty.
But here's the real issue: the new employee isn't the weakness. The biggest risk isn't the person who's careless. It's the person who's trying to be helpful.
If you lead a team, you probably already know exactly who would reply first.
The real problem isn't training. It's the setup.
Now picture that employee's first day.
The laptop wasn't ready. Access wasn't fully provisioned. The email account was still being built. They used a coworker's login to check one quick task. They saved a file on their local drive because the shared folder wasn't available. They grabbed a client number from their personal phone because it was faster.
None of it seemed dangerous. It felt efficient. It felt like being proactive on a hectic first day.
But during that first week, before everything is fully in place, a few critical risks quietly appear. Shared credentials create untracked access, files escape your backup system, personal devices touch company data, and nobody explains what to do when something looks suspicious.
The same Keepnet report found that new employees are 44% more likely to fall for phishing than tenured staff. That gap doesn't come from recklessness. It comes from confusion. When onboarding is messy, security becomes an afterthought. That's exactly the kind of environment a phishing email is designed to exploit.
The vulnerability wasn't created by the attack. It was created on day one.
What a secure first day should include
Solving this doesn't require a lengthy security lecture on day one. It requires three things to be ready before the employee arrives.
1. Their access is set up, not figured out on the fly.
That means the laptop is prepared, credentials are issued and permissions are clearly defined. No borrowed logins, no temporary fixes and no "we'll handle that later this week."
2. They understand what normal looks like in your business.
This can be a quick 10-minute conversation. Does the CEO ever email staff 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 for help if they knew who to ask. Most first-week mistakes happen quietly because new hires don't want to seem inexperienced.
Give them a person. Give them a process.
Most security mistakes don't happen because someone ignores the rules. They happen because no one has taught the rules yet.
Maybe your onboarding process is already strong. Maybe your team is small enough that first days feel more personal than procedural. But if you've ever had a new hire improvise through week one — or if you're bringing someone on this spring — it's worth having the conversation before that Tuesday email arrives.
Click here or give us a call at 877-310-0123 to schedule your free 15-Minute Discovery Call.
And if you know another business owner who's preparing to hire, pass this along. The best time to secure that door is before anyone tries to open it.
