NULL

A .NULL file is a file related to the Null ransomware. The ransomware will change all of the files on the computer to have a .NULL file extension. When you see a .NULL extension somewhere, and you change it back, it will not revert it back, as the data of the file has already been encrypted.

Information
Null is a type of malware created by cyber criminals that encrypts all of a computer's files hostage and forces them to pay a ransom (usually BitCoin) to unlock them. It is often downloaded onto a computer through an eMail or malicious files.

The Null ransomware will encrypt the files and add the to the end of it. The targeted files are usually images, documents, backup files, videos, and more. Common file extensions could be .DOCX, .JPG, .MP4, and .DB files. An example could be would be changed to.