F-Secure BlackLight is a tool that detects files, folders and processes hidden from the user and other programs. BlackLight is also able to remove hidden malware by renaming them.
The rootkit eliminator is vulnerable to an elevation of privileges vulnerability which can be used by a simple user that can change the executable file with a binary of choice. The vulnerability exist due to the improper permissions, with the 'C' flag (change/write) for the 'Everyone' group, for the 'fsbl.exe' binary file.