Cheats representing tech support have invented a new trick to fool the victims their. They try to convince its users Firefox browser, that their computer license is illegal, and that they should call technical support immediately. They even warn users that if they don't do it in 5 minutes, they will lock it computer their.
The crooks exploiting a bug in Firefox, which for years allowed malicious people to send spam warnings to their victims for alleged "authentication" problems.
These warnings act as browser lockers, preventing users from shutting them down or exiting the Firefox browser. THE Mozilla released in July a fix to Firefox 68 that was designed to prevent such attacks.
The fix included blocking all types of pop-up "authentication" alerts, even those created by the site's core domain.
However, Malwarebytes' Threat Intelligence chief Jérôme Segura recently discovered that malware managed to bypass the fix and continue to carry out similar attacks on users.
After his discovery, Segura contacted Mozilla, whose technicians are now working on repair of the problem.
He had discovered another browser lock technique about two years ago, but so far it has not been repaired. The fake tech support page, which is still in operation today, was originally designed to target Chrome, but it was fixed in Chrome version of 67.
The messages on the browser lock page are full of false warnings. Below the Windows support number provided, it states:
Do not ignore this important warning
Stop and do not shut down the computer
Your computer's registry key is locked.
Why are we blocking your computer?
Windows registry key is illegal.
This Windows desktop uses pirated software.
This Windows desktop sends viruses over the Internet.
This Windows desktop is hacked.
We have blocked this computer for your safety. Please call us within 5 minutes to prevent your computer from turning off.