Did you just run into a file that has been digitally signed by KOG Co., Ltd.? If so, please read on.
You will typically see KOG Co., Ltd. when clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screencap shows:

You can view additional details from the KOG Co., Ltd. certificate with the following steps:
Here's a screenshot of a file that has been digitally signed by KOG Co., Ltd.:

As you can see in the screenshot above, Windows states that "This digital signature is OK". This means that the file has been published by KOG Co., Ltd. and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can examine 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 KOG Co., Ltd., such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the KOG Co., Ltd. certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screengrab above.
These are the KOG Co., Ltd. files I've gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the KOG Co., Ltd. files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by KOG Co., Ltd..
| Detection Ratio | File Name |
|---|---|
| Not available | x2.exe |
The analysis has been done on certificates with the following serial numbers: