Did you just find a file that has been digitally signed by MegaBackup Corp.? If so, please read on.
You will typically see MegaBackup Corp. 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 MegaBackup Corp. certificate with the following procedure:
Here's a screenshot of a file that has been digitally signed by MegaBackup Corp.:

As you can see in the screenshot above, Windows reports that "This digital signature is OK". This implies that the file has been published by MegaBackup Corp. and that the file has not been tampered with.
If you click the View Certificate button shown in the screengrab 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, and so on. You can also examine the address for MegaBackup Corp., such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the MegaBackup Corp. 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 MegaBackup Corp. files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 1/58 | mounter.exe |
| 1/56 | App.exe |
| 1/56 | Installer.exe |
| 0/57 | dokanmb.sys |
| 0/56 | dokanmb.sys |
| 0/54 | mounter.exe |
| 0/55 | dokanmb.sys |
Here's the detection names for the MegaBackup Corp. files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| Bkav | W64.HfsAdware.FE59 |
| ESET-NOD32 | a variant of Win32/MegaBackup.B potentially unwanted |
| Qihoo-360 | HEUR/QVM03.0.Malware.Gen |
The detection percentage is based on the fact that I've collected 392 scan reports for the MegaBackup Corp. files. 3 of these scan reports came up with some sort of detection. If you like, you can review the full details of the scan reports by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: