Download Assistant - 21% Detection Rate *
Did you just run into a download or a file on your computer that has been digitally signed by Download Assistant? Some of the security products refers to the detected files as AirInstaller (fs) and PUA.DownloadAssistant. The detection rate for the Download Assistant files collected here is 21%. Please read on for more details.
You will probably notice Download Assistant when running the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screengrab shows:
You can view additional details from the Download Assistant certificate with the following procedure:
- Open Windows Explorer and locate the Download Assistant file
- Right-click the file and select Properties
- Click the Digital Signatures tab
- Click the View Certificate button
Here's a screenshot of a file signed by Download Assistant:
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 Download Assistant and that no one has tampered with the file.
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, and so on. You can also see the address for Download Assistant, such as the street name, city and country.
Symantec Class 3 SHA256 Code Signing CA and VeriSign Class 3 Code Signing 2010 CA has issued the Download Assistant certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
Download Assistant Files
The following are the Download Assistant files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 11/56 | setup_adobe_flash_player.exe |
| 3/55 | Adobe Shockwave.exe |
| 8/55 | Setup.exe |
| 25/56 | Setup.exe |
Scanner and Detection Names
Here is the detection names for the Download Assistant files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| AVG | Generic.EC4, Generic.E47, Generic.397 |
| AVware | AirInstaller (fs) |
| Ad-Aware | Gen:Variant.Application.Bundler.DownloadAssistant.5 |
| Agnitum | Riskware.Agent! |
| Antiy-AVL | GrayWare[AdWare]/Win32.DownloadAssistant.ac |
| Avast | Win32:Adware-CKC [PUP] |
| Avira | PUA/DownloadAssist.Gen4 |
| Bkav | W32.HfsAdware.DBE6 |
| CAT-QuickHeal | PUA.Downloadas.Gen |
| CrowdStrike | malicious_confidence_66% (D) |
| DrWeb | Trojan.Vittalia.133, Trojan.Vittalia.1474 |
| ESET-NOD32 | a variant of Win32/DownloadAssistant.A potentially unwanted, a variant of Win32/DownloadAssistant.A, a variant of Win32/DownloadAssistant.C potentially unwanted |
| Fortinet | Riskware/Generic.AC.102D50 |
| GData | Win32.Application.DownloadAssistant.A, Win32.Adware.DownloadAssistant.C |
| Ikarus | PUA.DownloadAssistant |
| Invincea | virus.win32.sality.at |
| K7AntiVirus | Adware ( 004b87ba1 ) |
| K7GW | Adware ( 004b87ba1 ) |
| Kaspersky | not-a-virus:HEUR:Downloader.Win32.DownloadAsist.gen |
| Malwarebytes | PUP.Optional.DownloadAssist, PUP.Optional.DownloadAssistant |
| McAfee-GW-Edition | BehavesLike.Win32.Suspicious.th |
| MicroWorld-eScan | Gen:Variant.Application.Bundler.DownloadAssistant.5 |
| NANO-Antivirus | Trojan.Win32.Vittalia.dtfepz, Trojan.Win32.MulDrop.eexjna |
| Qihoo-360 | HEUR/QVM07.1.0000.Malware.Gen |
| Rising | Trojan.Assistant!1.A3BC (classic) |
| Sophos | AirInstaller |
| VBA32 | suspected of Malware-Cryptor.FSP.gen, Downloader.DownloadAsist |
| VIPRE | AirInstaller (fs) |
| Yandex | Riskware.Agent! |
| Zillya | Trojan.VittaliaCRTD.Win32.1081 |
* How the Detection Percentage is Calculated
The detection percentage is based on that I've collected 222 scan results for the Download Assistant files. 47 of these scan results came up with some sort of detection. If you like, you can review the full details of the scan results by examining the files listed above.
Analysis Details
The analysis is based on certificates with the following serial numbers:
- 04a0cf6ae167d0090dfcd45981346775
- 6bc405e8ac962c676f54816bcc4d4311
- 088066a3a015128f544f3e16dc53bce8