Files with ytbl extension can be found as files encrypted and affected by a ransomware labeled as Troldesh.
YTBL file extension - Troldesh (variant) ransomware affected file
What is ytbl file? How to open ytbl files?
File type specification:
File extension ytbl is used by a variant of ransomware called Troldesh which much like other similar threats encrypts users files and demands bitcoins as ransom. It is distributed via .zip files downloaded from internet links provided in a spam email.