The message lands in the inbox 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 tied up in back-to-back meetings. I need you to take care of 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's normal, and they definitely don't want to be the person who questions the CEO in their first week.
So they comply.
And in a few clicks, the damage is already underway.
Why the first week is the highest-risk week
Every spring, companies welcome a fresh wave of employees, including recent graduates and summer interns stepping into their first professional roles. For businesses, it means onboarding season. For attackers, it means opportunity.
According to Keepnet Lab's 2025 New Hires Phishing Susceptibility Report, CEO impersonation emails are 45% more likely to work on new hires than on experienced staff.
Cybercriminals don't usually target your most seasoned team members. They focus on people still learning the culture, the tools, and the unwritten rules because the start of a job is full of uncertainty.
A new employee doesn't yet know what an ordinary request looks like. They don't understand how the CEO typically communicates. They haven't had time to build confidence or instincts, and attackers use that gap to their advantage.
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 one who's trying to be helpful.
If you manage a business, you probably already know exactly who on your team would respond right away.
The real problem isn't training. It's the process.
Think about that employee's first day.
The laptop wasn't fully ready. Access hadn't been completed. Their email account was still pending. They borrowed a coworker's login to check something fast. They saved a file on their desktop because the shared drive wasn't available. They used their personal phone to look up a client number because it was quicker.
None of it felt unsafe. It felt practical. It felt like finding a way to keep moving on a hectic first day.
But during that first week, before systems are fully in place, a few critical risks quietly appear. Shared credentials create untracked accounts, files drift outside backup coverage, personal devices touch business data, and nobody explains what to do when something seems suspicious.
The same Keepnet report found that new employees are 44% more likely to fall for phishing than tenured staff. That gap isn't caused by recklessness. It's caused by confusion. When onboarding is messy, security becomes optional. That's exactly the kind of environment a phishing email is built for.
The attack didn't create the vulnerability. Day one did.
What a secure first day should look like
Solving this doesn't require a long lecture about security on the first morning. It requires three things to be in place before the employee ever starts.
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 shared logins, no temporary fixes, and no "we'll handle that later this week."
2. They know what a legitimate 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 feels unusual? This isn't formal training; it's a basic onboarding conversation.
3. They know exactly where to go with questions.
The employee who paused before clicking that email probably would have checked with someone if they knew who to ask. Most first-week mistakes happen quietly because new hires don't want to look inexperienced.
Give them a contact. Give them a clear process.
Most security mistakes don't happen because someone chooses to ignore the rules. They happen because the rules haven't been made clear 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 figure things out as they go — or if you're preparing to bring someone on this spring — it's worth addressing the gaps before that Tuesday email shows up.
Click here or give us a call at (925) 766-4005 to schedule your free 15-Minute Discovery Call.
And if you know another business owner who's hiring soon, send this their way. The smartest time to close the door is before anyone gets inside.
