.FUN File Extension
What is a FUN file?
3D file created and used by Invent, a tool that allows users to design and create 3D models; contains information, such as points, planes, and axes, that describe a three-dimensional design; allows you to close the design and make changes to the design after opening it again.
NOTE: The FUN file format is the main format used by Invent. The format can be used to share designs with other Invent uses and can also contain instructions for beginners on how to alter the design.
Programs that open FUN files
Jigsaw Ransomware Encrypted File
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What is a FUN file?
A FUN file is a file that has been encrypted by Jigsaw ransomware, which is malware distributed by cybercriminals. It contains a file, such as a .JPG, .DOCX, .XLSX, .MP4, or .CSV file, that has been renamed and encrypted by the virus. FUN files can be decrypted for free using a decryption tool available on BleepingComputer.
In 2016, some PC users reported that their computers had been infected by a new form of ransomware called Jigsaw. This ransomware showed users a picture of Billy, the puppet from the movie Saw, and told them that they must pay $150 in Bitcoin or watch as, hour by hour, more and more of their files were deleted.
However, the anti-malware community quickly developed a defense against Jigsaw. Users who encounter the malware should first use Task Manager to terminate the firefox.exe and drpbx.exe processes running on their computer. This will prevent Jigsaw from deleting any more files. Users should then run MSConfig and disable the startup entry called firefox.exe, to stop the malware from restarting itself.
Then, users can use the free Jigsaw Decrypter available at BleepingComputer.com to decrypt their FUN files.
NOTE: Jigsaw may also rename files to use the .KKK, .gws, or .btc extensions.
How do I open a FUN file?
Because FUN files are encrypted with ransomware, they cannot be opened. However, you can decrypt FUN files to restore them to their original state.
To decrypt FUN files, download the free Jigsaw Decrypter available at BleepingComputer.com. Then, open the decrypter, select the directory you want to decrypt, and decrypt your files. Repeat this process until you have decrypted all your files.