Did you just run into a download or a file on your computer that has been digitally signed by chestertontechnology.com? Some of the security products refers to the detected files as Application.Agent.AKV and not-a-virus:NetTool.Win64.NetFilter.rb. The detection rate for the chestertontechnology.com files collected here is 35%. Please read on for more details.
You will probably see chestertontechnology.com when clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screencap shows:

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

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 chestertontechnology.com and that no one has tampered with the file.
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, and so on. You can also examine the address for chestertontechnology.com, such as the street name, city and country.
GlobalSign CodeSigning CA - G3 has issued the chestertontechnology.com certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the chestertontechnology.com files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 19/58 | 00d8effc72521035bab2242bbfadc7ce.sys |
| 21/57 | f080d4eb9a52ea95345f1d2a0ae19a41.sys |
Here is the detection names for the chestertontechnology.com files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| Ad-Aware | Application.Agent.AKV |
| Antiy-AVL | Trojan/Win32.BTSGeneric |
| Arcabit | Application.Agent.AKV |
| BitDefender | Application.Agent.AKV |
| DrWeb | Adware.Wajam.309 |
| Emsisoft | Application.Agent.AKV (B) |
| F-Secure | Application.Agent.AKV |
| Fortinet | Riskware/NetFilter |
| GData | Application.Agent.AKV |
| Ikarus | not-a-virus:NetTool.Win64.NetFilter |
| Jiangmin | KVBASE, NetTool.NetFilter.eh |
| K7AntiVirus | Riskware ( 0040eff71 ) |
| K7GW | Riskware ( 0040eff71 ) |
| Kaspersky | not-a-virus:NetTool.Win64.NetFilter.rb |
| McAfee | Artemis!733854773B71, Artemis!96F04C3788C1 |
| McAfee-GW-Edition | Artemis |
| MicroWorld-eScan | Application.Agent.AKV |
| Panda | Trj/CI.A |
| Qihoo-360 | Win32/Application.14c, Win32/Virus.NetTool.01b |
| Symantec | Trojan.Gen.2 |
| Webroot | Malicious |
The detection percentage is based on the fact that I've collected 115 scan results for the chestertontechnology.com files. 40 of these scan reports came up with some sort of detection. 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: