Did you just stumble upon a download or a file on your computer that is digitally signed by Serial Protocol? Some of the security products refers to the detected files as Adware.BrowseFox.BU and Gen:Variant.Adware.Browsefox.14. The detection rate for the Serial Protocol files collected here is 55%. Please read on for more details.
You will typically notice Serial Protocol when double-clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screengrab shows:

You can view the digital signature details for Serial Protocol with the following procedure:
Here's a screengrab of a file that has been digitally signed by Serial Protocol:

As you can see in the screengrab above, Windows states that "This digital signature is OK". This implies that the file has been published by Serial Protocol and that the file has not been tampered with.
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, etc. You can also examine the address for Serial Protocol, such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the Serial Protocol certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the Serial Protocol files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 39/57 | 1d80e5b540.dll |
| 41/57 | 1d80.dll |
| 14/57 | BrowseMark.FindLib.dll |
Here's the detection names for the Serial Protocol files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| ALYac | Gen:Variant.Adware.Browsefox.14 |
| AVG | AdPlugin.CVY, AdPlugin.CUI, Generic.303 |
| AVware | Trojan.Win32.Generic!BT |
| Ad-Aware | Gen:Variant.Adware.Browsefox.14, Adware.BrowseFox.BU |
| AegisLab | Variant.Adware.Jaiko.mDiB, AdWare.W32.Yotoon.m25a |
| AhnLab-V3 | PUP/Win32.BrowseFox |
| Antiy-AVL | Trojan/Win32.TSGeneric, GrayWare[AdWare]/Win32.Yotoon.szt, GrayWare[AdWare]/MSIL.BrowseFox.g |
| Arcabit | Trojan.Adware.Browsefox.14, Adware.BrowseFox.BU |
| Avast | Win32:BrowseFox-OW [PUP] |
| Avira | ADWARE/BrowseFox.Gen7, ADWARE/BrowseFox.Gen |
| Baidu | Win32.Trojan.WisdomEyes.151026.9950.9996, Win32.Adware.BrowseFox.t |
| BitDefender | Gen:Variant.Adware.Browsefox.14, Adware.BrowseFox.BU |
| CAT-QuickHeal | Pua.Dealkeeper.020134, AdWare.Yotoon.A6 |
| ClamAV | Win.Adware.Browsefox-224, Win.Adware.Browsefox-209 |
| Comodo | Application.Win32.AltBrowse.OABP, TrojWare.Win32.BrowseFox.FY |
| Cyren | W32/S-96b6140d!Eldorado, W32/Trojan.UPQP-8212, W32/S-2915a4c9!Eldorado |
| DrWeb | Trojan.BPlug.892, Trojan.BPlug.891, Trojan.Yontoo.4845 |
| ESET-NOD32 | a variant of Win32/BrowseFox.N potentially unwanted, a variant of Win32/BrowseFox.M potentially unwanted, a variant of MSIL/BrowseFox.G potentially unwanted |
| Emsisoft | Gen:Variant.Adware.Browsefox.14 (B), Adware.BrowseFox.BU (B) |
| F-Prot | W32/S-96b6140d!Eldorado, W32/Trojan2.OVRF, W32/S-2915a4c9!Eldorado |
| F-Secure | Gen:Variant.Adware.Browsefox, Adware.BrowseFox.BU |
| GData | Gen:Variant.Adware.Browsefox.14, Adware.BrowseFox.BU, MSIL.Adware.BrowseFox.W@gen |
| Ikarus | PUA.BrowseFox, PUA.SecretSauce, PUA.MSIL.BrowseFox |
| Jiangmin | AdWare.BrowseFox.awhp, AdWare/BrowseFox.nu |
| K7AntiVirus | Trojan ( 004a07811 ), Trojan ( 004a073e1 ) |
| K7GW | Trojan ( 004a07811 ), Trojan ( 004a073e1 ) |
| Kaspersky | not-a-virus:HEUR:AdWare.Win32.BrowseFox.gen, not-a-virus:AdWare.Win32.Yotoon.szt |
| Malwarebytes | PUP.Optional.BrowseFox, PUP.Optional.Yontoo |
| McAfee | BrowseFox-FWV, BrowseFox-FWL |
| McAfee-GW-Edition | BehavesLike.Win32.BrowseFox.ch, BehavesLike.Win32.BrowseFox.dh |
| MicroWorld-eScan | Gen:Variant.Adware.Browsefox.14, Adware.BrowseFox.BU |
| NANO-Antivirus | Trojan.Win32.BPlug.dmjozr, Trojan.Win32.BPlug.dmjqza |
| Qihoo-360 | QVM30.1.Malware.Gen, HEUR/QVM23.0.0000.Malware.Gen |
| SUPERAntiSpyware | Adware.BrowseFox/Variant |
| Symantec | PUA.Yontoo.C |
| Tencent | Win32.Risk.Adware.Pavk, Win32.Risk.Adware.Lmbl, Win32.Risk.Adware.Ajbw |
| VBA32 | AdWare.Win64.Kranet, AdWare.Kranet |
| VIPRE | Trojan.Win32.Generic!BT |
| ViRobot | Trojan.Win32.AD-Agent.197352[h], Trojan.Win32.AD-Agent.285424[h] |
| Yandex | Riskware.Agent! |
| Zillya | Adware.Agent.Win32.38120, Adware.Agent.Win32.37670 |
| nProtect | Adware.BrowseFox.BU |
The detection percentage is based on the fact that I've collected 171 scan results for the Serial Protocol files. 94 of these scan reports came up with some sort of detection. You can review the full details of the scan results by examining the files listed above.
The analysis is based on certificates with the following serial numbers: