Cookie Theft: How Hackers Hijack Your Online Accounts
Session cookie theft lets fraudsters access your accounts without passwords. Here's how the attack works and why it's a growing threat.
A silent but sophisticated form of cybercrime is enabling fraudsters to access victims' bank accounts and online profiles without ever needing a password. Known as cookie theft, the attack exploits so-called session cookies — small digital tokens that websites use to recognize a logged-in user — allowing criminals to impersonate victims in real time.
When a user logs into a website, the site issues a session cookie that acts as a temporary digital key, confirming the user's identity for the duration of their visit. If a fraudster can steal that cookie before the session ends, they can present it to the same website and gain full access to the account, bypassing login credentials and even two-factor authentication entirely.
Read more New Buy Now Pay Later Rules Bring Affordability Checks for Shoppers →
The attack falls under a broader category of cybercrime called session hijacking. Unlike phishing schemes that trick users into surrendering passwords, cookie theft can occur without any direct interaction from the victim, making it particularly difficult to detect. A person could complete routine financial tasks — checking balances, making payments — and close their device with no indication that anything is wrong, while criminals simultaneously exploit the stolen session in the background.
Security researchers regard session cookies as a high-value target precisely because they grant immediate, authenticated access to accounts. The window of vulnerability typically lasts only as long as the session remains active, but that window can be enough for significant financial or data damage to occur. Users are generally advised to log out of sensitive accounts rather than simply closing browser tabs, as active sessions persist until formally terminated.
As online banking and account management become routine daily activities, session hijacking represents a growing vector that cybersecurity professionals say requires greater public awareness. Continue reading at Business | The Guardian.
