Did you just find a file that has a digital signature from SMART GREY LLC? If that's the case, please read on.
You will typically see SMART GREY LLC when running 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 SMART GREY LLC certificate with the following steps:
Here's a screenshot of a file that has been signed by SMART GREY LLC:

As you can see in the screenshot above, the Windows OS reports that "This digital signature is OK". This means that the file has been published by SMART GREY LLC and that the file has not been tampered with.
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, etc. You can also see the address for SMART GREY LLC, such as the street name, city and country.
COMODO RSA Code Signing CA has issued the SMART GREY LLC certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the SMART GREY LLC files I have collected, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the SMART GREY LLC files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by SMART GREY LLC.
| Detection Ratio | File Name |
|---|---|
| Not available | programa_crack.exe |
The analysis is based on certificates with the following serial numbers: