Thwarting potentially malicious online activity

1. A computer-implemented method for thwarting potentially malicious online activity, at least a portion of the method being performed by a network device comprising at least one processor, the method comprising:

logging legitimate online user activities that were performed at, and detected at, a browser;

receiving a report of a suspicious online activity that was performed at, and detected at, a web server hosting a website;

comparing the reported suspicious online activity to the logged legitimate online user activities to determine whether the reported suspicious online activity matches any of the logged legitimate online user activities; and

in response to determining that the reported suspicious online activity does not match any of the logged legitimate online user activities:

determining that the reported suspicious online activity is a potentially malicious online activity; and

thwarting the potentially malicious online activity by performing a remedial action at the website to protect the website from the potentially malicious online activity.

2. The method of claim 1 , wherein the legitimate online user activities performed at the browser are captured by a password manager.

3. The method of claim 2 , wherein the password manager is a browser extension of the browser.

4. The method of claim 2 , wherein the report of the suspicious online activity is received by the password manager.

5. The method of claim 2 , wherein, prior to the logging, the user is authenticated by the password manager at the browser in order to confirm that any activities performed at the browser by the user are legitimate.

6. The method of claim 1 , wherein the performing of the remedial action at the website comprises blocking one or more network devices from accessing the website.

7. The method of claim 1 , wherein the performing of the remedial action at the website comprises rolling back one or more changes at the website that were made in response to the potentially malicious online activity.

8. One or more non-transitory computer-readable media comprising one or more computer-readable instructions that, when executed by one or more processors of a network device, cause the network device to perform a method for thwarting potentially malicious online activity, the method comprising:

logging legitimate online user activities that were performed at, and detected at, a browser;

receiving a report of a suspicious online activity that was performed at, and detected at, a web server hosting a website;

comparing the reported suspicious online activity to the logged legitimate online user activities to determine whether the reported suspicious online activity matches any of the logged legitimate online user activities; and

in response to determining that the reported suspicious online activity does not match any of the logged legitimate online user activities:

determining that the reported suspicious online activity is a potentially malicious online activity; and

thwarting the potentially malicious online activity by performing a remedial action at the website to protect the website from the potentially malicious online activity.

9. The one or more non-transitory computer-readable media of claim 8 , wherein the legitimate online user activities performed at the browser of the network device are captured by a password manager.

10. The one or more non-transitory computer-readable media of claim 9 , wherein the password manager is a browser extension of the browser.

11. The one or more non-transitory computer-readable media of claim 9 , wherein the report of the suspicious online activity is received by the password manager.

12. The one or more non-transitory computer-readable media of claim 9 , wherein, prior to the logging, the user is authenticated by the password manager at the browser in order to confirm that any activities performed at the browser by the user are legitimate.

13. The one or more non-transitory computer-readable media of claim 8 , wherein the performing of the remedial action at the website comprises blocking one or more network devices from accessing the website.

14. The one or more non-transitory computer-readable media of claim 8 , wherein the performing of the remedial action at the web site comprises rolling back one or more changes at the website that were made in response to the potentially malicious online activity.

15. A network device for thwarting potentially malicious online activity, the network device comprising:

one or more processors; and

one or more non-transitory computer-readable media comprising one or more computer-readable instructions that, when executed by the one or more processors, cause the network device to perform a method comprising:

logging legitimate online user activities that were performed at, and detected at, a browser;

receiving a report of a suspicious online activity that was performed at, and detected at, a web server hosting a website;

comparing the reported suspicious online activity to the logged legitimate online user activities to determine whether the reported suspicious online activity matches any of the logged legitimate online user activities; and

in response to determining that the reported suspicious online activity does not match any of the logged legitimate online user activities:

determining that the reported suspicious online activity is a potentially malicious online activity; and

thwarting the potentially malicious online activity by performing a remedial action at the website to protect the website from the potentially malicious online activity.

16. The network device of claim 15 , wherein the legitimate online user activities performed at the browser of the network device are captured by a password manager that is a browser extension of the browser.

17. The network device of claim 16 , wherein the report of the suspicious online activity is received by the password manager.

18. The network device of claim 16 , wherein, prior to the logging, the user is authenticated by the password manager at the browser in order to confirm that any activities performed at the browser by the user are legitimate.

19. The network device of claim 15 , wherein the performing of the remedial action at the website comprises blocking one or more network devices from accessing the website.

20. The network device of claim 15 , wherein the performing of the remedial action at the website comprises rolling back one or more changes at the website that were made in response to the potentially malicious online activity.