Did you just find a download or a file on your computer that has been digitally signed by NCsoft Corp.? If that's the case, please read on.
You will typically notice NCsoft Corp. when running the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the digital signature details for NCsoft Corp. with the following procedure:
Here's a screenshot of a file signed by NCsoft Corp.:

As you can see in the screenshot above, Windows reports that "This digital signature is OK". This means that the file has been published by NCsoft Corp. and that no one has tampered with the file.
If you click the View Certificate button shown in the screenshot above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also view the address for NCsoft Corp., such as the street name, city and country.
SGTRUST CODE SIGNING CA has issued the NCsoft Corp. certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the NCsoft Corp. files I have collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 1/47 | NCUpdateHelper.exe |
| 1/56 | aion.bin |
| 0/51 | NCUpdateHelper.exe |
| 0/54 | Au_.exe |
| 0/52 | NCUpdateHelper.exe |
| 0/65 | NCUpdateHelper.exe |
Here's the detection names for the NCsoft Corp. files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| Comodo | Heur.Suspicious, TrojWare.Win32.Trojan.Obfuscated.~EN |
The detection percentage is based on the fact that I have gathered 325 scan results for the NCsoft Corp. files. 2 of these scan results came up with some sort of detection. If you like, you can review the full details of the scan results by examining the files listed above.
The analysis is done on certificates with the following serial numbers: