ycs.exe is a application which is most likely NOT a virus or malware. So, if ycs.exe is on your computer, it is most likely ok, and will NOT be a cause for concern. Even if your PC is clean, it is still recommended to use a good antivirus with a good detection rate, in order to yourself your PC against viruses and malware.
Usually, this application is located in C:\Program Files\Yandex\Browser\Protect\ycs.exe.
The MD5 checksum for this file is 995de48d0b200f30da932c8dc0a26bdc.
This application is set up as a Windows service. This means it runs on your PC in background, usually without displaying any user interface to you. Most Windows services are useful programs, which perform useful functions to other applications or to Windows in general.
64-bit code has been detected. This application can exploit the full power of a current PC processor.
The description written in the file is Yandex Protect Service.
File version stored as a property 1.10.677.19906.
Company name Yandex LLC..
Intellectual property rights notice Copyright (C) 2017 Yandex LLC..
Some dangerous features of Windows appear to be used, such as functions for recording the keyboard. We advise you to read more about this program.
ycs.exe has a digital signature. Today most clean programs are digitally signed.
The digital signature extracted from ycs.exe verifies as ok. This is excellent.
The name of the organization or individual signing this is: firstname.lastname@example.org
Digital certificate name: YANDEX LLC
Certificate's issuer name: GlobalSign CodeSigning CA - G2
It has an uninstall routine, which is a good sign. si are uninstall.