Did you just run into a download or a file on your computer that is digitally signed by KOMERCNI BANKA A.S.? If that's the case, please read on.
You'll probably see KOMERCNI BANKA A.S. when double-clicking to run the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view additional details from the KOMERCNI BANKA A.S. certificate with the following procedure:
Here is a screencap of a file digitally signed by KOMERCNI BANKA A.S.:

As you can see in the screengrab above, the Windows OS reports that "This digital signature is OK". This means that the file has been published by KOMERCNI BANKA A.S. and that no one has tampered with the file.
If you click the View Certificate button shown in the screenshot above, you can view all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also view the address for KOMERCNI BANKA A.S., such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the KOMERCNI BANKA A.S. certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screengrab above.
The following are the KOMERCNI BANKA A.S. files I have gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/57 | proxyhostkbext.exe |
The detection percentage is based on that I have collected 57 scan reports for the KOMERCNI BANKA A.S. files. 0 of these scan reports came up with some sort of detection. If you like, you can view the full details of the scan reports by examining the files listed above.
The analysis is done on certificates with the following serial numbers: