Did you just download a file that has been digitally signed by AT&T Services, Inc and wonder if the file is safe? If so, please read on.
You will probably see AT&T Services, Inc 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 additional details from the AT&T Services, Inc certificate with the following procedure:
Here is a screenshot of a file digitally signed by AT&T Services, Inc:

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 AT&T Services, Inc and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can examine 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 examine the address for AT&T Services, Inc, such as the street name, city and country.
VeriSign Class 3 Code Signing 2009-2 CA has issued the AT&T Services, Inc certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the AT&T Services, Inc files I've gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the AT&T Services, Inc files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by AT&T Services, Inc.
| Detection Ratio | File Name |
|---|---|
| Not available | f_0001b5 |
The analysis is based on certificates with the following serial numbers: