What is 21srg698.au3.tb? Should I remove it?

The 21srg698.au3.tb file is dangerous to the computer system and your privacy. It belongs to a parasite, whose payload may differ depending on its type. While relatively harmless pests may use 21srg698.au3.tb to degrade system performance, display commercial advertisements or perform other annoying actions, really dangerous parasites may use 21srg698.au3.tb to damage your system, infect files, corrupt installed software and violate your privacy. DO NOT open this file!
The 21srg698.au3.tb file is installed and used by Sohana.
Please note that the 21srg698.au3.tb file actually may be a fully legitimate part of the operating system or legitimate software. Often parasites use files with unsuspicious names, but malicious functionality. You should always carefully check the file before deleting it. It may not be related with malware, but can be required by your essential programs to work properly.