What is .Lokf file .Lokf file extension is an extension that is associated with a new variant of dangerous ransomware called STOP (djvu). Variant ‘Lokf’ (v0181) was released this week, a few days after the previous version, called Mosk. It encrypts data on victim’s computer and appends filenames with .Lokf extension. All encrypted files become … Continue reading .Lokf file extension. Remove Lokf virus. Restore, Decrypt .lokf files.