IP Library Granted Patent US 11,729,212
Granted Patent B2
US 11,729,212 · App. 17/461,551 · Granted Aug 15, 2023

Systems and methods for use of address fields in a simulated phishing attack

Inventors: Jasmine Rodriguez (Clearwater, FL); Daniel Cormier (Clearwater, FL)
Assignee: KnowBe4, Inc.
H04L63/1483G09B19/0053H04L51/08
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Quick Facts
Patent No.
US 11,729,212
App. No.
17/461,551
Granted
Aug 15, 2023
Kind
B2
Abstract

Systems and methods are disclosed for creating simulated phishing attack messages that have characteristics which make them appear genuine, while also having characteristics that a user should recognize as being false. Simulated phishing emails may appear to be more realistic to a recipient user if the user observes that the email has also been sent to an individual known to the recipient within the same company. However, it may not be desirable to send the simulated phishing email to such additional recipients. The systems and methods include communicating a simulated phishing email from a server of a simulated phishing attack system to a recipient user of an entity. The simulated phishing email appears to the recipient user as though it is also addressed to one or more non-recipient users of the entity, even though the email is not sent to the non-recipient users.

Claims (27)

1. A method comprising:

creating, by one or more processors, a simulated phishing email addressed via one or more address fields to a recipient user and one or more non-recipient users, the one or more non-recipient users addressed using one or more valid email addresses of the one or more non-recipient users, wherein the one or more valid email addresses comprises an email address of an individual in a same organization as the recipient user;

initiating, by the one or more processors, transmission of the simulated phishing email to a mail system;

communicating, by the one or more processors, to the mail system a first command of a RCPT TO command to a mail transfer protocol to include the recipient user as a recipient of the simulated phishing email and to exclude the one or more valid email addresses of the one or more non-recipient users addressed in the one or more address fields from receiving the simulated phishing email; and

communicating, by the one or more processors to the mail system, a second command of a DATA command to the mail transfer protocol that identifies one or more email addresses of the one or more non-recipient users with content of the simulated phishing email to the recipient user to cause displaying the one or more valid email addresses of the one or more non-recipient users in one or more address fields of the simulated phishing email to the recipient user to appear that the simulated phishing email was communicated to the one or more non-recipient users that were excluded from receiving the simulated phishing email by the first command.

2. The method of claim 1 , wherein the first command is the RCPT TO command of the mail transfer protocol comprising a simple mail transfer protocol (SMTP).

3. The method of claim 1 , wherein the second command is the DATA command of the mail transfer protocol comprising a simple mail transfer protocol (SMTP).

4. The method of claim 1 , further comprising identifying, by the one or more processors, for the recipient user the one or more valid email addresses of the one or more non-recipient users to be displayed as a recipient of the simulated phishing email when received by the recipient user.

5. The method of claim 1 , wherein the one or more valid email addresses comprises an email address of an individual with a relationship to the recipient user.

6. The method of claim 1 , further comprising initiating, by the one or more processors, transmission of the simulated phishing email to the mail system.

7. The method of claim 1 , wherein the simulated phishing email is displayed to the recipient user with the one or more valid email addresses of the one or more non-recipient users as recipients of the simulated phishing email.

8. The method of claim 1 , further comprising receiving, by the one or more processors, an indication that the recipient user interacted with the simulated phishing email.

9. The method of claim 8 , further comprising identifying, by the one or more processors based at least on the indication, training for the recipient user.

10. A system comprising:

one or more processors, coupled to memory and configured to:

create a simulated phishing email addressed via one or more address fields to a recipient user and one or more non-recipient users, wherein the one or more non-recipient users are addressed using one or more valid email addresses of the one or more non-recipient users, wherein the one or more valid email addresses comprises an email address of an individual in a same organization as the recipient user;

initiate transmission of the simulated phishing email to a mail system;

communicate to the mail system a first command of a RCPT TO command to a mail transfer protocol to include the recipient user as a recipient of the simulated phishing email and to exclude the one or more valid email addresses of the one or more non-recipient users addressed in the one or more address fields from receiving the simulated phishing email; and

communicate to the mail system a second command of a DATA command to the mail transfer protocol that identifies one or more email addresses of the one or more non-recipient users with content of the simulated phishing email to the recipient user to cause displaying the one or more valid email addresses of the one or more non-recipient users in one or more address fields of the simulated phishing email to the recipient user to appear that the simulated phishing email was communicated to the one or more non-recipient users that were excluded from receiving the simulated phishing email by the first command.

11. The system of claim 10 , wherein the first command is the RCPT TO command of the mail transfer protocol comprising a simple mail transfer protocol (SMTP).

12. The system of claim 10 , wherein the second command is the DATA command of the mail transfer protocol comprising a simple mail transfer protocol (SMTP).

13. The system of claim 10 , wherein the one or more processors are further configured to identify for the recipient user the one or more valid email addresses of the one or more non-recipient users to be displayed as a recipient of the simulated phishing email when received by the recipient user.

14. The system of claim 10 , wherein the one or more valid email addresses comprises an email address of an individual with a relationship to the recipient user.

15. The system of claim 10 , wherein the one or more processors are further configured to initiate transmission of the simulated phishing email to the mail system.

16. The system of claim 10 , wherein the simulated phishing email is displayed to the recipient user with the one or more valid email addresses of the one or more non-recipient users as recipients of the simulated phishing email.

17. The system of claim 10 , wherein the one or more processors are further configured to receive an indication that the recipient user interacted with the simulated phishing email.

18. The system of claim 17 , wherein the one or more processors are further configured to determine, based at least on the indication, training for the recipient user.

Assignments (5)
PATENT SECURITY AGREEMENT Recorded Aug 8, 2025
From: KNOWBE4, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 072337/0277 →
RELEASE OF SECURITY INTEREST IN PATENT COLLATERAL RECORDED AT REEL/FRAME: 062627/0001 Recorded Jul 28, 2025
From: BLUE OWL CREDIT INCOME CORP. (FORMERLY KNOWN AS OWL ROCK CORE INCOME CORP.)
To: KNOWBE4, INC.
Reel/Frame 072108/0205 →
PATENT SECURITY AGREEMENT Recorded Feb 2, 2023
From: KNOWBE4, INC.
To: OWL ROCK CORE INCOME CORP., AS COLLATERAL AGENT
Reel/Frame 062627/0001 →
CORRECTIVE ASSIGNMENT TO CORRECT THE ADD THE SECOND INVENTOR PREVIOUSLY RECORDED AT REEL: 057370 FRAME: 0111. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Dec 27, 2022
From: RODRIGUEZ, JASMINE; CORMIER, DANIEL
To: KNOWBE4, INC.
Reel/Frame 062228/0674 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 2, 2021
From: RODRIGUEZ, JASMINE
To: KNOWBE4, INC.
Reel/Frame 057370/0111 →