On a Tuesday morning, an email lands in the inbox.
It appears to come straight from the CEO. The sender name is correct. The wording feels believable. Even the signature seems 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. They're still learning the workflow, still figuring out what counts as normal, and they definitely don't want to challenge the CEO in their first week.
So they comply.
And with one click, the loss begins.
Why week one is the easiest target
Each spring, organizations welcome a fresh wave of employees, including new graduates and summer interns stepping into their first professional roles. For the business, it's onboarding season. For criminals, 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 employees.
Threat actors don't start with your most experienced staff. They target the people still learning the basics, because early on, everything is unfamiliar and confidence is low.
A new employee may not know what a legitimate request looks like. They may not understand how leadership normally communicates. They haven't yet built the instincts that come from experience, and attackers exploit that uncertainty.
But the real issue isn't the employee. The biggest risk isn't someone being reckless. It's someone trying hard to be helpful.
If you manage a team, you probably already know exactly who would be quickest to respond.
The real weakness isn't training. It's the setup.
Think back to that employee's first day.
The laptop wasn't ready. Access was incomplete. The email account was still being set up. They borrowed a coworker's login to check something quickly. They saved a file to their desktop because the shared drive wasn't available. They used a personal phone to find a client number because it was faster.
None of that seemed unsafe. It felt practical. It felt like the fastest way to get through a hectic first day.
Yet during that first week, while the process is still taking shape, problems start to appear quietly. Shared credentials leave behind untracked access, files move outside backup coverage, personal devices touch company data, and no one has clearly explained what to do when something looks suspicious.
The same Keepnet report shows new employees are 44% more vulnerable to phishing than tenured staff. That difference isn't about poor judgment. It's about disorder. When onboarding is messy, security becomes an afterthought. That's exactly the kind of environment a phishing email is designed to exploit.
The attack didn't invent the gap. Day one did.
What a secure first day should look like
Solving this doesn't mean launching into a long security lecture on day one. It means having three essentials ready before the employee arrives.
1. Access is set up ahead of time, not improvised.
The laptop should be ready, credentials should be issued, and permissions should be clearly defined. No borrowed logins, no temporary workarounds, and no "we'll handle it later this week."
2. They understand what a normal request looks like in your company.
This can be a brief 10-minute conversation. Does the CEO ever email about payments? Does anyone? What should they do if something seems suspicious? This isn't a formal course; it's practical orientation.
3. They know exactly where to turn with questions.
The employee who paused before opening that email probably would have asked for help if they knew who to contact. Many first-week mistakes stay hidden because new hires don't want to appear inexperienced.
Give them a person. Give them a clear process.
Most security mistakes don't happen because someone deliberately ignores 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 the first few days feel more personal than procedural. But if a new hire has ever had to make it up as they went through week one — or if you're planning to bring someone on this spring — it's worth tightening the process before that Tuesday email arrives.
Click here or give us a call at 303-415-2702 to schedule your free 15-Minute Discovery Call.
And if you know another business owner preparing to hire, pass this along. The best time to shut that door is before anyone tries to walk through it.
