Did you just stumble upon a file that has a digital signature from Marc Newlin? If so, please read on.
You will probably see Marc Newlin when double-clicking to run 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 Marc Newlin with the following procedure:
Here is a screenshot of a file that has been signed by Marc Newlin:

As you can see in the screenshot above, Windows states that "This digital signature is OK". This implies that the file has been published by Marc Newlin 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, and so on. You can also view the address for Marc Newlin, such as the street name, city and country.
StartCom Class 2 Primary Intermediate Object CA has issued the Marc Newlin certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screengrab above.
The following are the Marc Newlin files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 1/45 | TechieBot.exe |
| 0/46 | ProcessCleanup.exe |
| 0/43 | TechieBotUpdater.exe |
Here's the detection names for the Marc Newlin files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| Symantec | WS.Reputation.1 |
The detection percentage is based on the fact that I've gathered 134 scan reports for the Marc Newlin files. 1 of these scan reports 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: