A Tuesday morning email can change everything.
It appears to come from the CEO. The name is correct. The wording sounds authentic. Even the signature seems spot on.
"Hey — can you help me with something quickly? I'm stuck in back-to-back meetings. I need you to take care of a vendor payment. I'll fill you in later."
The new hire stops and thinks.
They've only been here four days. They're still learning the workflow. They don't yet know what requests are normal, and they certainly don't want to be the person who challenges the CEO during their first week.
So they do what seems reasonable and help out.
And with that one decision, the breach begins.
Why week one is the highest-risk window
Each spring, organizations welcome a fresh group of employees, including new graduates and summer interns stepping into their first professional roles. For businesses, it's onboarding season. For cybercriminals, it's prime hunting time.
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 getting oriented, because the earliest days are full of uncertainty and unfamiliar routines.
New employees don't yet know what a legitimate request looks like. They don't understand how the CEO normally communicates. They haven't built the confidence or instincts that come from experience, and criminals use that gap to their advantage.
But the issue isn't the new hire. The biggest risk isn't someone being reckless. It's someone trying too hard to be helpful.
If you lead a team, you probably already know who would respond first.
The real weakness isn't training. It's the setup.
Think about a new employee's first day.
The laptop wasn't ready. Access wasn't fully provisioned. The email account was still being created. They used a coworker's login to check one thing quickly. They saved a file locally because the shared drive wasn't available. They pulled up a client number on their personal phone because it was faster.
None of that felt dangerous. It felt practical. It felt like getting through a busy first day the best way possible.
But in that first week, while the systems are still catching up, several risks quietly appear. Shared credentials create untracked accounts, files land outside backup protection, personal devices touch company data, and nobody has explained what to do when something doesn't look right.
The same Keepnet report found that new employees are 44% more likely to fall for phishing than longer-tenured staff. That gap isn't about negligence. It's about disorder. When onboarding is messy, security gets pushed aside. That's the environment a phishing email is designed to exploit.
The attack didn't invent the weakness. The first day did.
What a secure first day should include
Solving this doesn't require a long security lecture on day one. It requires three things to be in place before the employee arrives.
1. Their access is set up properly, not patched together.
That means the laptop is ready, credentials are created, and permissions are clearly assigned. No borrowed logins, no temporary shortcuts, and no "we'll handle that later this week."
2. They understand what normal communication looks like.
This can be a quick 10-minute conversation. Does the CEO ever email about payments? Does anyone? What should they do if a request feels suspicious? This isn't a formal course; it's basic orientation that prevents costly confusion.
3. They know exactly where to turn with questions.
The employee who paused before clicking that email likely would have asked someone if they knew who that someone was. Many first-week mistakes happen quietly because new hires don't want to look inexperienced.
Give them a person. Give them a clear process.
Most security failures don't happen because someone ignores the rules. They happen because the rules haven't been learned yet.
Maybe your onboarding process 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 figure things out on their own during week one — or if you're planning to bring someone on this spring — now is the time to tighten the process before that Tuesday email arrives.
Click here or give us a call at 866-523-2985 to schedule your free 15-Minute Discovery Call.
And if another business owner in your network is hiring soon, pass this along. The smartest time to secure the door is before anyone tries to open it.
