Did you just run into a download or a file on your computer that has been digitally signed by vassytechnology.com? Some of the security products refers to the detected files as W32.Adware.Gen and heuristic. The detection rate for the vassytechnology.com files collected here is 10%. Please read on for more details.
You will typically notice vassytechnology.com when double-clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screencap shows:

You can also view the vassytechnology.com certificate with the following steps:
Here's a screenshot of a file signed by vassytechnology.com:

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 vassytechnology.com and that the file has not been tampered with.
If you click the View Certificate button shown in the screencap 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, and so on. You can also view the address for vassytechnology.com, such as the street name, city and country.
GlobalSign CodeSigning CA - G3 has issued the vassytechnology.com 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 vassytechnology.com files I have collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 7/67 | 6af20966cbd9071a00e14e1c939d8bbf.sys |
| 10/69 | MWVkZG.exe |
| 4/67 | 482b0753906eb68c786250b4fbf026cb.sys |
| 6/69 | NWU5NDJhMT.exe |
| 7/69 | yji3zdc5ztbhowqz |
| 5/62 | 75436f2549812bd6541ecff824e32bd4.sys |
| 6/66 | c9f70324ea367724aaa7575fb3a736bc.sys |
| 5/69 | ytk0ntkwytq4mzr.exe |
| 8/67 | ztfhmjzhzdqyntg5ogi.exe |
| 11/69 | mjnkmtq |
Here is the detection names for the vassytechnology.com files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| CrowdStrike | malicious_confidence_60% (D), malicious_confidence_70% (D), malicious_confidence_80% (D) |
| Cylance | Unsafe |
| Cyren | W32/Trojan.ZERH-2241 |
| DrWeb | Adware.Wajam.575, Adware.Wajam.855, Adware.Wajam.858, Adware.Wajam.859, Adware.Wajam.861 |
| ESET-NOD32 | Win32/Adware.Zdengo.BMP, a variant of Win32/Adware.Zdengo.BNW |
| Endgame | malicious (high confidence) |
| Fortinet | Riskware/Zdengo |
| Ikarus | PUA.NetFilter, PUA.RiskWare.NetFilter |
| Invincea | heuristic |
| Malwarebytes | Adware.Wajam |
| McAfee | Artemis!C2C43EABB033 |
| McAfee-GW-Edition | Artemis |
| Microsoft | PUA:Win32/Puwaders.B!ml, Trojan:Win32/Ludicrouz.Y |
| Qihoo-360 | Trojan.Generic |
| Rising | PUA.Puwaders!8.F98B (CLOUD), Malware.Generic.4!tfe (thunder:4:TWd8iu3OAgK) |
| Sophos | Generic PUA OA (PUA) |
| TrendMicro-HouseCall | Suspicious_GEN.F47V0124, Suspicious_GEN.F47V0616, Suspicious_GEN.F47V0126 |
| VBA32 | BScope.Adware.Agent |
| Webroot | W32.Adware.Gen, W32.Wajam |
The detection percentage is based on that I have collected 674 scan results for the vassytechnology.com files. 69 of these scan reports came up with some sort of detection. If you like, you can view the full details of the scan results by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: