Did you just run into a download or a file on your computer that has been digitally signed by Apps Installer S.L.? Some of the security products refers to the detected files as Application.Bundler.M and Dropped:Application.Bundler.Firseria.D. The detection rate for the Apps Installer S.L. files collected here is 35%. Please read on for more details.
You will probably see Apps Installer S.L. when double-clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the additional details from the Apps Installer S.L. digital signature with the following steps:
Here is a screenshot of a file digitally signed by Apps Installer S.L.:

As you can see in the screenshot above, Windows states that "This digital signature is OK". This means that the file has been published by Apps Installer S.L. and that no one has tampered with the file.
If you click the View Certificate button shown in the screencap 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, etc. You can also see the address for Apps Installer S.L., such as the street name, city and country.
Thawte Code Signing CA - G2 has issued the Apps Installer S.L. certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the Apps Installer S.L. files I have collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 6/47 | 50b892e5-d96c-476b-834e-555c5bc06f2f.exe |
| 3/47 | MP3db 2012.exe |
| 11/54 | s1662.exe |
| 14/44 | s8407.exe |
| 21/54 | s8548.exe |
| 23/52 | AnimalBikesMod1.6.4.exe |
| 45/56 | LittleBlocksMod1.6.4.exe |
Here is the detection names for the Apps Installer S.L. files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| AVG | BundleApp.EA |
| AVware | DownloadMR (fs) |
| Ad-Aware | Application.Bundler.M, Dropped:Application.Bundler.Firseria.D |
| Agnitum | Trojan.MulDrop!z3KdCfxAF5g |
| AhnLab-V3 | PUP/Win32.Solimba, PUP/Win32.FirseriaInstaller |
| AntiVir | APPL/FirseriaI.A |
| Antiy-AVL | RiskWare[Downloader:not-a-virus]/Win32.Solimba, GrayWare[AdWare]/Win32.Fiseria.u |
| Arcabit | Application.Bundler.Firseria.D |
| Avast | MSIL:Solimba-T [PUP], Win32:Solimba-C [PUP], Win32:PUP-gen [PUP] |
| Avira | PUA/FirseriaI.A |
| Baidu-International | Adware.Win32.FirseriaInstaller.81, Adware.Win32.FirseriaInstaller.BH |
| BitDefender | Application.Bundler.M, Dropped:Application.Bundler.Firseria.D |
| Bkav | W32.HfsAdware.A362 |
| CAT-QuickHeal | Downloader.Solimba.r3 (Not a Virus), PUA.Appsinstal.Gen |
| ClamAV | Win.Trojan.Fiseria-11 |
| Comodo | Application.Win32.Firseria.K |
| Cyren | W32/A-c99c506c!Eldorado |
| DrWeb | Adware.Downware.1125, Trojan.MulDrop5.32888 |
| ESET-NOD32 | a variant of MSIL/Solimba.I, a variant of MSIL/Solimba.AC, a variant of Win32/FirseriaInstaller.I, a variant of Win32/FirseriaInstaller.I potentially unwanted |
| F-Prot | W32/A-c99c506c!Eldorado |
| F-Secure | Application.Bundler.M, Dropped:Application.Bundler.Firseria |
| Fortinet | Riskware/Solimba, Adware/Fiseria |
| GData | Application.Bundler.M, Dropped:Application.Bundler.Firseria.D |
| Ikarus | PUA.Morstar |
| Jiangmin | AdWare/Fiseria.gjw |
| K7AntiVirus | Riskware ( 0049c6801 ), Unwanted-Program ( 0040f8561 ) |
| K7GW | Riskware ( 0049c6801 ), Trojan ( 020000001 ), Unwanted-Program ( 0040f8561 ) |
| Kaspersky | not-a-virus:Downloader.Win32.Solimba.a, not-a-virus:AdWare.Win32.Fiseria.t, not-a-virus:AdWare.Win32.Fiseria.u |
| Kingsoft | Win32.Troj.DownSolimba.a.(kcloud), Win32.Troj.Generic.a.(kcloud) |
| Malwarebytes | PUP.Optional.BundleInstaller.A, PUP.Optional.AppsInstaller |
| McAfee | Artemis!17FCF5C9B33B, Artemis!3E3AB97A3BE5, Artemis!13B3E3BB0757, Artemis!094837E66182, Artemis!7ABFCF975EA1, Artemis!0DCE11C4B06E |
| McAfee-GW-Edition | Artemis!17FCF5C9B33B, Artemis!3E3AB97A3BE5, Artemis!13B3E3BB0757, Artemis!094837E66182, Artemis!7ABFCF975EA1, BehavesLike.Win32.MultiPlug.gc |
| MicroWorld-eScan | Application.Bundler.M, Dropped:Application.Bundler.Firseria.D |
| Microsoft | TrojanDropper:Win32/Sventore.A |
| NANO-Antivirus | Trojan.Win32.Dapato.dcdcwe, Riskware.Win32.Fiseria.dakwhg |
| Panda | Trj/Chgt.A, Trj/Chgt.C, Trj/Genetic.gen, Adware/Solimba |
| Qihoo-360 | Win32/Virus.Downloader.745, HEUR/Malware.QVM10.Gen |
| Rising | PE:Malware.FirseriaInstaller!6.19E3 [F] |
| SUPERAntiSpyware | Trojan.Agent/Gen-Falcomp[RE] |
| Sophos | DownloadMR, Solimba Installer, Solimba Installer (PUA) |
| Symantec | SMG.Heur!cg1 |
| Tencent | Win32.Adware.Firseria.Jms |
| TotalDefense | Win32/Solimba.QVLJbTD |
| TrendMicro | ADW_SOLIMBA, TROJ_GEN.R0CBC0UDT15 |
| TrendMicro-HouseCall | TROJ_GEN.F47V0518, Suspicious_GEN.F47V0619, ADW_SOLIMBA, Suspicious_GEN.F47V0629 |
| VBA32 | Signed-Downware.Morstar.AppsInstallerSL, Downware.Morstar |
| VIPRE | DownloadMR (fs), Trojan.Win32.Generic!BT |
| Zillya | Adware.Fiseria.Win32.1 |
| nProtect | Trojan-Clicker/W32.Fiseria.509416.B |
The detection percentage is based on that I have gathered 354 scan results for the Apps Installer S.L. files. 123 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 based on certificates with the following serial numbers: