Home Possibly Unwanted Program Best Youtube Downloader

Best Youtube Downloader

Posted: February 16, 2015

Threat Metric

Ranking: 13,439
Threat Level: 1/10
Infected PCs: 5,481
First Seen: February 16, 2015
Last Seen: September 19, 2023
OS(es) Affected: Windows


Best YouTube Downloader by Sistema Ltd is one of those applications that seem handy initially but later may cause some issues to its clients. The software falls into the category of the Potentially Unwanted Programs (PUPs), so its presence on your PC is not recommended. As its name implies, this application promises to let you download content from YouTube. Since the most popular video platform still doesn't offer this feature directly through its own toolkit, many PC users resort to third-party programs for the job. However, the experts' advice is to find alternative software because Best YouTube Downloader may change the functionality of Google Chrome, Mozilla Firefox and Internet Explorer negatively. Although the PUP may allow you to store videos on your hard disk, the fact that it may display unrequested and persistent commercial materials may be enough to neutralize its helpful functions. Whenever you go online, you may encounter some pretty aggressive pop-ups, banners and interstitial ads. You can be sure that it is exactly the PUP that generates them because the vouchers and coupons possess the slogan 'Powered by Best YouTube Downloader.' The advertising process may lead to real functionality problems like slower operating speed or random freezes. You should be vigilant with its partner sites because their legitimacy remains doubtful. Sometimes, the seemingly beneficial vouchers and discounts may take you to unsafe parts of the Web. Bestyoutubedownloader.com, which is the official product page of Best YouTube Downloader, is not the only way that it may reach your PC. The PUP also may be bundled with third-party software. If you never requested the installation of this questionable application or the ads are disturbing you, you should use special security applications to remove it.

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:



C:\Program Files\best youtube downloader\Toolbar32.dll File name: C:\Program Files\best youtube downloader\Toolbar32.dll
MD5: 3407a821c627289e9b32d54f323d6f42
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
C:\Program Files\Best YouTube Downloader\uninstall.exe File name: C:\Program Files\Best YouTube Downloader\uninstall.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
BackgroundSingleton.exe File name: BackgroundSingleton.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
info.json File name: info.json
Mime Type: unknown/json
Group: Malware file
Interfaces32.dll File name: Interfaces32.dll
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
Interfaces64.dll File name: Interfaces64.dll
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
Loader.exe File name: Loader.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Toolbar64.dll File name: Toolbar64.dll
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file

Registry Modifications

The following newly produced Registry Values are:

CLSID{EB6628CF-0675-4DAE-95CE-EFFA23169743}HKEY..\..\..\..{RegistryKeys}Software\Best YouTube DownloaderSoftware\Microsoft\Internet Explorer\Approved Extensions\{5B3B7C2A-FB3F-46FF-B50F-1C7C8FE92F36}Software\Microsoft\Internet Explorer\Approved Extensions\{EB6628CF-0675-4DAE-95CE-EFFA23169743}SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{8262746A-CDF6-4797-8AFD-8E6D9A20EA53}Software\Policies\Microsoft\Internet Explorer\SearchScopes\{EB6628CF-0675-4DAE-95CE-EFFA23169743}SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{8262746A-CDF6-4797-8AFD-8E6D9A20EA53}

Additional Information

The following directories were created:
%APPDATA%\Best YouTube Downloader%PROGRAMFILES%\Best YouTube Downloader%PROGRAMFILES(x86)%\Best YouTube Downloader%appdata%\BYD
The following URL's were detected:
/bestyoutubedownloader.com/com.ad.bestyoutubedownloaderwww.neobars.com
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