Did you just find a download or a file on your computer that has been digitally signed by White Winter? Some of the security products refers to the detected files as Adware.SwiftBrowse.CH and Adware.BrowseFox.V. The detection rate for the White Winter files collected here is 56%. Please read on for more details.
You will probably notice White Winter when running the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screencap shows:

You can also view the White Winter certificate with the following procedure:
Here's a screenshot of a file that has been digitally signed by White Winter:

As you can see in the screenshot above, the Windows OS states that "This digital signature is OK". This implies that the file has been published by White Winter 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, etc. You can also view the address for White Winter, such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the White Winter 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 White Winter files I've gathered, thanks to the FreeFixer users.
Here's the detection names for the White Winter files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| ALYac | Adware.SwiftBrowse.CH, Gen:Variant.Adware.Mikey.11547, Adware.BrowseFox.V |
| AVG | AdPlugin.DAI, AdPlugin.DIY, BrowseFox.88B |
| AVware | Trojan.Win32.Generic!BT |
| Ad-Aware | Adware.SwiftBrowse.CH, Gen:Variant.Adware.Mikey.11547, Adware.BrowseFox.V |
| AegisLab | AdWare.Win64.Yotoon.mf8s |
| Agnitum | Riskware.Agent!, PUA.BrowseFox! |
| AhnLab-V3 | PUP/Win32.BrowseFox |
| Antiy-AVL | GrayWare[NetTool:not-a-virus]/Win64.NetFilter.a, GrayWare[AdWare:not-a-virus]/Win32.Yotoon.kam |
| Arcabit | Adware.SwiftBrowse.CH, Trojan.Adware.Mikey.D2D1B |
| Avira | ADWARE/BrowseFox.drc, ADWARE/BrowseFox.Gen2, ADWARE/BrowseFox.A.1227 |
| Baidu | Win32.Adware.BrowseFox.n |
| Baidu-International | Hacktool.Win64.NetFilter.k, Hacktool.Win32.NetFilter.A |
| BitDefender | Adware.SwiftBrowse.CH, Gen:Variant.Adware.Mikey.11547, Adware.BrowseFox.V |
| Bkav | W64.HfsAdware.A503, W32.BrowseFoxAC.Adware, W32.HfsAdware.A503 |
| CAT-QuickHeal | PUA.BrowseFox.OL8 |
| ClamAV | Win.Adware.Swiftbrowse-513, Win.Adware.Swiftbrowse-497, Win.Adware.Netfilter-134 |
| Comodo | Application.Win32.BrowseFox.AKP, TrojWare.Win32.AltBrowse.IZZV |
| Cyren | W64/A-59c9c70a!Eldorado, W32/S-a7161e1c!Eldorado |
| DrWeb | Trojan.Yontoo.2594 |
| ESET-NOD32 | a variant of Win64/NetFilter.A potentially unsafe, a variant of Win32/BrowseFox.AE potentially unwanted, a variant of Win32/NetFilter.A potentially unsafe |
| Emsisoft | Adware.SwiftBrowse.CH (B), Gen:Variant.Adware.Mikey.11547 (B), Adware.BrowseFox.V (B) |
| F-Prot | W64/A-59c9c70a!Eldorado, W32/S-a7161e1c!Eldorado |
| F-Secure | Adware.SwiftBrowse.CH, Gen:Variant.Adware.Mikey, Adware.BrowseFox.V |
| Fortinet | Riskware/NetFilter |
| GData | Adware.SwiftBrowse.CH, Gen:Variant.Adware.Mikey.11547, Adware.BrowseFox.V |
| Ikarus | PUA.BrowseFox, AdWare.BrowseFox |
| Jiangmin | AdWare/SwiftBrowse.dxt |
| K7AntiVirus | Adware ( 0040f9f21 ), Adware ( 004b929e1 ), Unwanted-Program ( 0040f9e71 ) |
| K7GW | Adware ( 0040f9f21 ), Adware ( 004b929e1 ), Unwanted-Program ( 0040f9e71 ) |
| Kaspersky | not-a-virus:NetTool.Win64.NetFilter.k |
| Malwarebytes | PUP.Optional.BrowseFox, PUP.Optional.Yontoo |
| McAfee-GW-Edition | BehavesLike.Win64.PUPAmonetize.ph |
| MicroWorld-eScan | Adware.SwiftBrowse.CH, Gen:Variant.Adware.Mikey.11547, Adware.BrowseFox.V |
| NANO-Antivirus | Trojan.Win32.Yontoo.dnkubo, Trojan.Win64.Yontoo.dywbnr, Riskware.Win32.Yotoon.dsmpht |
| Panda | Generic Suspicious |
| Qihoo-360 | Win32/Virus.NetTool.094, HEUR/QVM00.1.Malware.Gen, Win32/Virus.Adware.429 |
| Rising | PE:Adware.BrowseFox!6.1D8B[F1] |
| SUPERAntiSpyware | Adware.SwiftBrowse/Variant, Adware.BrowseFox/Variant |
| Sophos | Browse Fox (PUA), Generic PUA OG (PUA) |
| Tencent | Win32.Risk.Adware.Eclf, Win32.Risk.Adware.Taoo, Win32.Risk.Adware.Ljtr |
| TrendMicro | PUA_BROWSEFOX |
| TrendMicro-HouseCall | PUA_BROWSEFOX |
| VBA32 | AdWare.MSIL.Agent, AdWare.Zaitu |
| VIPRE | Trojan.Win32.Generic!BT |
| Yandex | Riskware.Agent! |
| Zillya | Adware.Yotoon.Win64.14, Adware.BrowseFox.Win32.84848 |
| nProtect | Adware.SwiftBrowse.CH, Adware.BrowseFox.V |
The detection percentage is based on that I have collected 1055 scan results for the White Winter files. 586 of these scan results 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 done on certificates with the following serial numbers: