Did you just find a download or a file on your computer that has been digitally signed by Rolimno? Some of the security products refers to the detected files as Adware.NetFilter.E and HS_BROWSEFOX.SM. The detection rate for the Rolimno files collected here is 51%. Please read on for more details.
You'll probably see Rolimno when running the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screengrab shows:

You can view the additional details from the Rolimno digital signature with the following procedure:
Here's a screenshot of a file digitally signed by Rolimno:

As you can see in the screengrab above, Windows reports that "This digital signature is OK". This means that the file has been published by Rolimno 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 examine the address for Rolimno, such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the Rolimno 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 Rolimno files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 29/57 | {e4c6227e-782d-4fb9-9a91-19df3596a980}w64.sys |
Here is the detection names for the Rolimno files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| ALYac | Adware.NetFilter.E |
| AVG | Rolimno |
| AVware | Trojan.Win32.Generic!BT |
| Ad-Aware | Adware.NetFilter.E |
| Agnitum | Trojan.BPlug! |
| AhnLab-V3 | Trojan/Win64.SwiftBrowse |
| Antiy-AVL | Trojan/Win32.TSGeneric |
| Baidu-International | Adware.Win32.BrowseFox.roli |
| BitDefender | Adware.NetFilter.E |
| ClamAV | Win.Adware.Swiftbrowse-75 |
| Cyren | W64/A-e967bae2!Eldorado |
| DrWeb | Trojan.BPlug.123 |
| ESET-NOD32 | a variant of Win64/NetFilter.A potentially unsafe |
| Emsisoft | Adware.NetFilter.E (B) |
| F-Prot | W64/A-e967bae2!Eldorado |
| F-Secure | Adware.NetFilter.E |
| GData | Adware.NetFilter.E |
| Jiangmin | AdWare/Yotoon.m |
| McAfee | Artemis!13BAA1A1ED64 |
| McAfee-GW-Edition | Artemis!Trojan |
| MicroWorld-eScan | Adware.NetFilter.E |
| Panda | Trj/CI.A |
| Sophos | BrowseSmart |
| Symantec | Yontoo.C |
| TrendMicro | HS_BROWSEFOX.SM |
| TrendMicro-HouseCall | HS_BROWSEFOX.SM |
| VIPRE | Trojan.Win32.Generic!BT |
| Zillya | Adware.Yotoon.Win64.3 |
| nProtect | Trojan-Clicker/W32.SwiftBrowse.61112 |
The detection percentage is based on the fact that I've collected 57 scan reports for the Rolimno files. 29 of these scan reports came up with some sort of detection. You can view the full details of the scan reports by examining the files listed above.
The analysis is based on certificates with the following serial numbers: