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TrojanDownloader:ASX/Wimad.J

First posted on 31 March 2019.
Source: Microsoft

Aliases :

There are no other names known for TrojanDownloader:ASX/Wimad.J.

Explanation :

TrojanDownloader:ASX/Wimad is a detection for malicious Windows media files that are used in order to encourage users to download and execute arbitrary files on an affected machine. When opened with Windows Media Player, these malicious files open a particular URL in a web browser. Installation TrojanDownloader:ASX/Wimad.J is a malicious Advanced Streaming Format (ASF) file, which when opened by Windows Media Player, urges a user to download and execute an arbitrary file.   In the wild, files detected as TrojanDownloader:ASX/Wimad.J have been observed being distributed with file extensions such as .MP3 .ASF .WMA and .ASX. The file names used have been varied and enticing. Wimad.J contacts www.cxgr.com in an attempt to download and install a malicious executable file which it masquerades as a codec required to play the windows media file. At the time of writing the malicious file was not available.   We strongly suggest that users avoid downloading and executing any files when prompted by Windows Media Player upon opening streaming format files.   Analysis by Oleg Petrovsky

Last update 31 March 2019

 

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