The First Week Mistake Nobody Plans For
New employees want to be helpful, which makes their first week a favorite target for phishing and CEO impersonation. Better onboarding closes the gap before attackers use it.
The email shows up on a Tuesday morning.
It looks like it is from the CEO. The name matches. The tone is right. Even the signature looks familiar.
"Hey, can you help me with something quickly? I am in back-to-back meetings. Need you to handle a vendor payment. I will explain later."
The new employee pauses.
They have been with the company for four days. They are still figuring out how things work. They do not know what is normal yet, and they definitely do not want to be the person who questions the CEO in their first week.
So they go ahead and help.
And just like that, the damage is done.
Why the First Week Is the Most Dangerous Week
Every spring, businesses bring in a new wave of employees, including recent graduates, seasonal staff, and summer interns stepping into their first roles. For companies, it is onboarding season. For attackers, it is something else entirely.
According to Keepnet Lab's 2025 New Hires Phishing Susceptibility Report, CEO impersonation emails are 45% more likely to succeed with new hires than with experienced employees.
Attackers do not go after your most seasoned people first. They go after the ones who are still learning the ropes because there is a window at the beginning where everything is unfamiliar and nothing feels certain.
A new employee does not know what a typical request looks like. They do not know how the CEO usually communicates. They have not had time to build instincts or confidence, and cybercriminals take advantage of that uncertainty.
But here is the thing: the new employee is not the problem. The most dangerous employee is not careless. It is the one trying to be helpful.
If you run a business, you probably already know exactly who on your team would respond first.
The Real Gap Is Not Training. It Is the System.
Now think back to that employee's first day.
Their laptop was not ready. Access had not been fully set up. Their email account was still being created. They borrowed someone else's login to check something quickly. They saved a file locally because they could not access the shared drive. They used their personal phone to look up a client number because it was faster.
None of that felt risky. It felt resourceful. Like doing what needed to get done on a hectic first day.
But in that first week, before everything is fully in place, a few important things happen quietly:
- Shared credentials create accounts nobody tracks
- Files end up outside your backup systems
- Personal devices touch business data
- No one explains what to do if something feels off
The same Keepnet report found that new employees are 44% more susceptible to phishing than tenured staff. That gap does not come from carelessness. It comes from chaos.
When onboarding is chaotic, security becomes optional. That is the environment the phishing email walks into.
The attack did not create the vulnerability. The first day did.
What a Prepared First Day Looks Like
Fixing this does not require a long security presentation on day one. It requires three things to be ready before the person walks in the door.
1. Their access is configured, not improvised.
The laptop is ready. Credentials are created. Permissions are clearly defined. There are no borrowed logins, no temporary workarounds, and no "we will sort that out later this week."
2. They know what a normal request looks like in your business.
This can be a quick, 10-minute conversation. Does the CEO ever email about payments? Does anyone? What should they do if something feels off?
This is not formal training. It is basic orientation.
3. They have somewhere to ask questions without feeling foolish.
The employee who hesitated before clicking that email probably would have asked someone if they had known who to ask. Most first-week mistakes happen quietly because new hires do not want to look inexperienced.
Give them a person. Give them a process.
Most security mistakes do not happen when someone ignores the rules. They happen when someone does not know the rules yet.
Close the Gap Before the First Email Arrives
Maybe your onboarding is already solid. Maybe your team is small enough that first days feel personal rather than procedural.
But if you have ever had a new hire improvise their way through week one, or if you are planning to bring someone on this spring, it is worth a conversation before that Tuesday email arrives.
Coulee Tech helps businesses across La Crosse, Eau Claire, Fort Myers, and beyond prepare secure onboarding processes, access controls, MFA, and security awareness habits that give new employees confidence from day one.
Book a free 10-minute discovery call and let us talk through how to make your first-week process safer without turning onboarding into a paperwork marathon.
And if you know another business owner who is about to hire, send this their way. The best time to close that door is before anyone walks through it.