If you suspect that your Facebook account has been compromised, you must change your password immediately. If you use Facebook to log in to apps like Spotify or Instagram make sure you change the logins too. This will prevent hackers from accessing these third-party services from your hacked Facebook profile.

Hackers can discover a wealth of personal information in hacked Facebook accounts. Hackers could use the information for malicious motives, like sending spam to people or sending fake credit card offers. Hackers may also use compromised accounts to send spam messages or to post on your timeline (as the case were you who was responsible).

One of the most common ways hackers can gain access to an account is to exploit an error in Facebook’s application code. For instance, a flaw in iOS’s Facebook app allowed hackers to steal cookies and take the iPhone user’s “access token.” These tokens are digital keys that allow the user complete control over the user’s Facebook account, and because of Single Sign-On, all other websites that the user uses their Facebook credentials.

Hackers also have the ability to gain account access by using brute-force attacks. This technique involves guessing the password, which is usually the most frequently used ones like 123456789, or 1234567890. Lastly, hackers can also gain access to accounts by sifting through compromised credentials. There are numerous free tools available to scan for stolen information, including the popular website HaveIBeenPwned.

https://www.app-ink.net/totally-free-antivirus-does-it-really-work