“They may want to make occasional but long-term use of your account and don't want to make it obvious,” warns Paul Ducklin, principal research scientist at security firm Sophos.Ĭlear signs you have been hacked include unusual messages to your friends – which might show up via your Facebook email notifications – and posts you don't remember making. To stay under the radar, some criminals won't even change your password. “Some people’s Facebook accounts are hacked and there’s no unusual activity for a while – the profile might then be sold on to a third party,” Matthews says. Some criminals will compromise your account, lock it, change the password and do nothing with it for some time. “If you're suddenly logged out of Facebook and your password no longer works, you've probably been hacked,” says Paul Bischoff, a privacy advocate at tech research company Comparitech. Adversaries will then try to lock you out by changing your account recovery options and email address. The first sign your Facebook account has been hacked is usually an email to notify you that your password has been changed. “They then use your profile to share malware or perform phishing attacks.” How to tell if your Facebook account has been hacked “Attackers want to steal your identity so they can take advantage of trust in your profile and friends,” says Chloe Matthews, a threat intelligence analyst at cybersecurity company F-Secure.
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