Did you just find a file that is digitally signed by Vishal Gupta? If so, please read on.
You will probably notice Vishal Gupta when running the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can also view the Vishal Gupta certificate with the following steps:
Here's a screenshot of a file that has been signed by Vishal Gupta:

As you can see in the screencap above, Windows states that "This digital signature is OK". This means that the file has been published by Vishal Gupta 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 see the address for Vishal Gupta, such as the street name, city and country.
Thawte Code Signing CA - G2 has issued the Vishal Gupta certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Vishal Gupta files I have collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 1/48 | is-J6B52.exe |
| 0/50 | PuranDefragBT.exe |
| 0/48 | PuranADT.exe |
| 0/43 | PuranDefragBT.exe |
| 0/48 | purandefrags.exe |
Here's the detection names for the Vishal Gupta files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| ByteHero | Trojan.Malware.Obscu.Gen.001 |
The detection percentage is based on the fact that I have gathered 329 scan reports for the Vishal Gupta files. 1 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: