Back to course

F1 Cyber Basics for Public Service

0% done: 0 of 8 lessons

Lesson 3 of 8 · Simulation

Phishing, fake invoices and payroll changes

Progress is saved on this device only. Keep it across devices with a free LFW account.

Curriculum0 of 8 done

Simulation

Spot the fake bank change in an inbox

A working copy of the real screen. Use it as you would the real one. Nothing you type leaves this page.

This exercise runs in your browser and needs JavaScript. The lesson text above covers the same steps.

Not done yet.

The email scams that cost public institutions real money, why the sender's address proves nothing and the call-back rule that stops them.

Notes

Step 1 of 6

Start here

Many email scams aimed at public institutions are not after your computer. They are after a payment. The FBI calls it business email compromise: a criminal gets into an email conversation, or imitates one, and asks for money to go somewhere new.

In 2024, the FBI's Internet Crime Complaint Center (IC3) received 21,442 business email compromise complaints, with reported losses of $2.77 billion. Those are only the losses people reported.

Step 2 of 6

The four versions you will see

Changed bank details. A vendor you pay every month emails to say their bank changed. The invoice looks right, the amount is right, and the email may come from the vendor's real address, because their mailbox was taken over.

Payroll diversion. An "employee" emails payroll or the clerk asking to move their direct deposit to a new account before the next pay date. The real employee finds out when their pay does not arrive.

The urgent official. A message that looks like it comes from the mayor, a board chair or the director asks for gift cards, a wire or a confidential favor, now, and asks you not to tell anyone.

The fake bill. An invoice for a domain renewal, a directory listing or a "compliance filing" the institution never ordered, often for an amount small enough to slip through.

Step 3 of 6

The sender's address proves nothing

IC3's definition of the scam includes compromising real email accounts. When a vendor's mailbox is taken over, the criminal sends from the vendor's genuine address, inside a genuine thread, using details from past messages.

Other times the address is a near copy: one letter changed, or a different ending. On a phone, the display name is often all you see.

So the test is not "does this look real?" It is "does this change where money goes?"

Step 4 of 6

The call-back rule

Any change to payment details, bank accounts or direct deposit is confirmed through a second channel before it takes effect:

  1. Call the number already on file, from your vendor records or the employee directory. Never a number in the email or the invoice.
  2. Ask a second person to approve the change. A two-person rule turns one tired moment into two chances to catch it.
  3. Write the rule down as institutional policy, so nobody has to feel rude for following it.

The FBI's own advice is the same: use a secondary channel to verify requests to change account information.

Step 5 of 6

Other warning signs

  • Urgency: "today," "before the board meets," "the account will be closed."
  • Secrecy: "keep this between us," "I'm in a meeting, just handle it."
  • A reply going to a different address than the one it came from.
  • A link to "view the invoice" that asks you to sign in.
  • An attachment you were not expecting, even from someone you know.

If a message pushes you to skip a step, that is the reason to take it.

Step 6 of 6

If you clicked, or money moved

If you entered a password on a strange page, change it now and tell your IT contact. Speed matters more than embarrassment, and reporting quickly is what a good employee does.

If money went out, call your bank immediately and ask it to recall the funds. Then file a complaint at ic3.gov. IC3 asks for reports regardless of the amount lost.

Its Recovery Asset Team works with banks to freeze funds; in 2024 it reported freezing $469.1 million in domestic cases. Freezing works best when the report comes in fast.

Sources

Task

Your task at your institution

Quiz

5 questions. Choose one answer for each, then check them. Each answer shows its reason.

1. A long-time vendor emails from their usual address with new bank details for next week's payment. What do you do?
2. An employee emails payroll asking to move their direct deposit to a new account. What is the safe step?
3. You realize a payment went to a criminal's account an hour ago. Who do you call first?
4. What does the FBI's Internet Crime Complaint Center say about small losses?
5. Which detail is the strongest warning sign in a payment request?
Show the answers
  1. B. Call the vendor at the number already on file. Real mailboxes get taken over. Only a call to a number you already had, not one in the email, confirms the change.
  2. B. Confirm with the employee in person or at their number on file. Payroll diversion uses exactly this message. Confirm through a channel the email did not provide.
  3. A. Your bank, to ask for a recall of the funds. The FBI's advice: contact your bank immediately and ask it to recall the funds, then file at ic3.gov. Time matters.
  4. B. Report regardless of the amount lost. IC3's guidance is to file a complaint regardless of the amount lost.
  5. B. It changes where the money goes, with urgency. Changed payment details plus pressure to act fast is the core of business email compromise.