A dll file extension is also related to the Virtumonde / Vundo Trojan malware. Vundo downloads and displays pop-up advertisements that often promote questionable computer-enhancement programs or fake anti-virus or anti-spyware utilities.

There are 4 other file types using
the DLL file extension!

dll icon.dll - Dynamic Link Library [common]

dll icon.dll - Google Chrome theme

dll icon.dll - Microsoft DLL dynamic web page

empty icon.dll - FSociety ransomware affected file

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DLL file extension - Virtumonde / Vundo Trojan infected data

What is dll file? How to open dll files?

File type specification:

Various data file type icon Various data file type

The dll file extension is associated with the Virtumonde / Vundo Trojan malware.

Vundo (also known as VirtuMonde and VirtuMundo) is a malicious software application that combines both adware and trojan characteristics.

Vundo is wide spread today and is probably one of the hardest programs to get rid of. Once installed, Vundo downloads and displays pop-up advertisements that often promote questionable computer-enhancement programs or fake anti-virus or anti-spyware utilities.

Lately, Vundo has been advertising several rogue programs called WinFixer2005, WinAntiVirus Pro 2006, WinAntiSpyware and RazeSpyware.

This dll file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

The default software associated to open dll file:

BitDefender icon

Softwin logoBitDefender  Microsoft Windows software

Company or developer:

BitDefender is complex protection suite for Microsoft Windows. It is able to defense computer against computer viruses, spyware and spam.

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .dll file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

List of recommended software applications associated to the .dll file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open dll file, edit dll file, convert dll file, view dll file, play dll file etc. (if exist software for corresponding action in File-Extensions.org's database).

Unspecified and all other actions for computer programs working with dll file - Virtumonde / Vundo Trojan infected data

Click on the software link for more information about BitDefender. BitDefender uses dll file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Microsoft Windows:

Main software associated with dll file by default:
BitDefender small icon BitDefender
Other suggested software:
AVG Antivirus small icon AVG Antivirus
Avast Antivirus small icon Avast Antivirus
Norton Antivirus small icon Norton Antivirus

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