Threat Description

Trojan:​HTML/Browlock

Details

Aliases:Trojan:​HTML/Browlock.[variant]
Category:Malware
Type:Trojan
Platform:HTML

Summary



Trojan:HTML/Browlock is ransomware that prevents users from accessing the infected machine's Desktop; it then demands payment, supposedly for either possession of illegal material or usage of illegal software.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.

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For more information, see Removing 'Police-themed' Ransomware.

For more general information on disinfection, please see Removal Instructions.



Technical Details



Trojan:HTML/Browlock has been reported to target users in multiple countries, including the United States, the United Kingdom and Canada. Typically, it will display a 'lock screen' purportedly from a local or federal law enforcement authority, claiming that the machine has been locked and encrypted due to 'illegal activities'. A 'fine' is then demanded to restore the system.

This malware was also covered in our Labs Weblog blogpost:

A lock screen used by one Browlock variant is shown below:






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