Files with sdn extension are also reported to have been generated by Virtumonde / Vundo malware. In any case, you should run anti-virus to make sure these files are not dangerous.

There are 2 other file types using
the SDN file extension!

empty icon.sdn - Smart Diary Suite ingredients data

empty icon.sdn - Shareware Distributors Network archive

Detailed description

Software that open sdn file

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SDN file extension - Virtumonde / Vundo Trojan infected data

What is sdn file? How to open sdn files?

File type specification:

Various data file type icon Various data file type

The sdn file extension is also related to files generated by Vundo malware.

Take great care when working with these files as they could be infected. Run your security or anti-virus program to make sure your computer is not in danger.

Updated: September 25, 2019

The default software associated to open sdn file:

AVG Antivirus icon

AVG Technologies (Grisoft) logoAVG Antivirus  Microsoft Windows software

Company or developer:
AVG Technologies (Grisoft)

AVG Antivirus is one of the most popular security and antivirus solutions on market. It is available in versions for almost all platforms.

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 .sdn 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.

Related links:

More info about Vundo Trojan

List of recommended software applications associated to the .sdn 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 sdn file, edit sdn file, convert sdn file, view sdn file, play sdn file etc. (if exist software for corresponding action in's database).

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

Click on the software link for more information about AVG Antivirus. AVG Antivirus uses sdn 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 sdn file by default:
AVG Antivirus small icon AVG Antivirus
Other suggested software:
Avast Antivirus small icon Avast Antivirus
Norton Antivirus small icon Norton Antivirus
BitDefender small icon BitDefender

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