Cookie theft: how fraudsters get the digital key to your accounts

Fraudsters are increasingly targeting session cookies, which are temporary data files stored on your device when you log into websites such as banks. These "session cookies" act as a digital key, allowing users to browse without repeatedly entering their login details. However, if a hacker steals an active session cookie, they can essentially become the victim and gain unauthorized access to accounts without needing passwords or triggering login alerts.

Cybersecurity expert Marijus Briedis, from NordVPN, warns that session cookies are often stolen through malware downloads, which directly target a browser's database and extract active session cookies. Once hackers acquire these stolen cookies, they can bypass multi-factor authentication (MFA) and potentially bypass security measures.

The theft may go unnoticed as users continue with their web browsing, unaware that their session has been hijacked. The impact of cookie theft can range from scamming friends via social media or email accounts to directly accessing bank accounts, changing orders, or redirecting online purchases. To protect against cookie theft, users are advised to be cautious when downloading software and extensions, watch for signs of malware infection, avoid using public WiFi for sensitive sites, and log out of accounts manually instead of simply closing tabs.

Regularly clearing cookies, using a password manager, and enabling MFA on accounts are also recommended precautions. If users suspect they have been compromised, they should run an antivirus scan, log out of all devices, and change their passwords.