Urgent warning about dark web leak that can leave passwords useless

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Hiyah ZaidiPublished Apr 3, 2024, 1:31pm|Updated Apr 3, 2024, 1:32pm

Hackers can steal information through cookies (Picture: Getty/iStockphoto)

Millions of cookies leaked on the dark web are leaving Brits at risk of being hacked – as cybercriminals can use them to get around passwords.

Cookies are mostly known as an annoying but essential tool for online browsing.

However, they have become a key tool for hackers to steal data and gain access to sensitive systems.

Now, data released by cybersecurity firm NordVPN has revealed that 54 billion cookies have been leaked on the dark web, with 14 million from the UK.

The company’s cybersecurity advisor Adrianus Warmenhoven said: ‘Thanks to the cookie consent popups, we view cookies as a necessary, albeit annoying part of being online.

‘However, many don’t realize that if a hacker gets hold of your active cookies, they might not need to know any logins, passwords, and even MFA to overtake your accounts.’

Cookies are the only way for a device to know who is using it.

Many people accept cookies without thinking twice (Picture: Getty/iStockphoto)

‘To put it simply, once the user logs in with a password and MFA, the server gives the user a cookie,’ says Mr Warmenhoven. ‘And the next time the same user comes back with this cookie, the server recognizes the cookie and knows that this user has already logged in – so there’s no need to ask for the same information again.’

This means if an active cookie is leaked online, an attacker could log into your account without a password or MFA.

And cookies can hold much more information than just a username and password.

People’s names, age, gender, locations, orientation and size are among the wealth of data cookies collect.

‘If you combine all of these details, you will get a very intimate picture of the user, which can allow for well-targeted scams or attacks,’ said Mr Warmenhoven.

Internet web pop up for cookie policy notification
Cookies appear on almost every website (Picture: Getty/iStockphoto)

From the 54 billion leaked cookies analyzed, 17% were active – but that rose to 56% of the UK cookies.

More than 2.5 billion of the cookies were from Google, with another 692 million from YouTube and over 500 million came from Microsoft and Bing.

‘Cookies from such core accounts are particularly dangerous because they may be used to access further login details through, for example, password recovery, corporate systems, or SSO,’ said Mr Warmenhoven.

There were 154 million authentication and 37 million login cookies.

NordVPN also found that name, email, city, password and address were
the most common words found in the personal information category.

Around 12 different types of malware were used to steal the cookies, with almost 56% collected by Redline – an information stealer and keylogger.

However, Mr. Warmenhoven also shared information on how to protect yourself from a cookie attack.

‘It’s a good idea to regularly delete cookies to minimize available data that can be stolen,’ he said. ‘Also, be aware of files you download and websites you visit – being vigilant can minimize your risk.’

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The article is in Romanian

Tags: Urgent warning dark web leak leave passwords useless

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