Did you just stumble upon a download or a file on your computer that is digitally signed by Vasiliy Ryabchenko? Some of the security products refers to the detected files as MalSign.Generic.F42 and Adware.Downware.1166. The detection rate for the Vasiliy Ryabchenko files collected here is 39%. Please read on for more details.
You'll typically notice Vasiliy Ryabchenko when double-clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the additional details from the Vasiliy Ryabchenko digital signature with the following steps:
Here's a screenshot of a file that has been signed by Vasiliy Ryabchenko:

As you can see in the screengrab above, Windows states that "This digital signature is OK". This means that the file has been published by Vasiliy Ryabchenko and that the file has not been tampered with.
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 see the address for Vasiliy Ryabchenko, such as the street name, city and country.
COMODO Code Signing CA 2 has issued the Vasiliy Ryabchenko certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Vasiliy Ryabchenko files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 20/51 | poverty-prepping--how-to-stock-up-for-tomorrow-when-you-cant-afford-to-eat-today.exe |
Here's the detection names for the Vasiliy Ryabchenko files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| AVG | MalSign.Generic.F42 |
| Agnitum | Adware.Agent!feJD23e6Y+s |
| AntiVir | ADWARE/InstallRex.Gen |
| Antiy-AVL | Spyware[AdWare:not-a-virus]/Win32.Agent |
| Avast | Win32:InstalleRex-AX [PUP] |
| Comodo | Application.Win32.Agent.W |
| DrWeb | Adware.Downware.1166 |
| ESET-NOD32 | Win32/InstalleRex.J |
| Fortinet | Riskware/InstalleRex |
| GData | Win32.Application.InstalleRex.E |
| Kaspersky | not-a-virus:AdWare.Win32.Agent.aeph |
| Kingsoft | Win32.Troj.Generic.a.(kcloud) |
| Malwarebytes | PUP.Optional.Installex |
| NANO-Antivirus | Riskware.Win32.Agent.crfilc |
| Panda | PUP/TSUploader |
| Qihoo-360 | Malware.QVM20.Gen |
| Rising | PE:PUF.InstallRex!1.9E4C |
| SUPERAntiSpyware | PUP.InstallRex/Variant |
| VBA32 | Downloader.AdLoad |
| VIPRE | Installerex/WebPick (fs) |
The detection percentage is based on the fact that I've gathered 51 scan reports for the Vasiliy Ryabchenko files. 20 of these scan results came up with some sort of detection. 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: