The streaming video format introduced by Microsoft is the WMV format. WMV is the collective name for a series of video codecs and related video encoding formats developed by Microsoft. It is part of the Microsoft Windows Media Framework. Since WMV video files often require IE download licenses and certificates to be enabled before viewing, they are prone to Trojan viruses. Intrusion.
The streaming video format introduced by Microsoft is the WMV format.
WMV (Windows Media Video) is the collective name for a series of video codecs and related video encoding formats developed by Microsoft. It is part of the Microsoft Windows Media Framework.
WMV contains three different codecs: As a competitor to RealVideo, WMV's original video compression technology was originally designed and developed for streaming applications on the Internet;
The other is for WMV screen and WMV image compression technology that meets the needs of specific content;
After standardization by SMPTE (Society of Motion Picture and Television Engineers), WMV version 9 was adopted as a release format for physical media, such as high-definition DVD and Blu-ray Disc, so-called VC-1.
Microsoft has also developed a digital container format called ASF (Advanced Systems Format) to save WMV video encoding. Under the same video quality, WMV format files can be played while being downloaded, so they are very suitable for online playback and transmission.
Due to Microsoft's own limitations, the development of WMV applications has not been smooth, and it has also faced many complaints from users and the media. Users are disgusted with the digital rights management (DRM) system added to WMV files in some cases. .
The ability to recover certificates for WMV files has not improved in Windows Media Player 11. In addition, Microsoft Zune does not support the standard Windows Media DRM system, so it cannot play protected WMV files.
WMV files are resisted by some users. The main reason is that WMV video files often require IE download licenses and certificates to be enabled before viewing.
Trojan virus producers often use this to bundle pop-up viruses with the certificate download process, causing users inconvenience and virus threats. Many advertising publishers and even busybodies also took the opportunity to embed their own advertising windows into it to increase traffic.
If you enter DRV pop-up window, WMV pop-up window, etc. in the search engine, you will find that many websites have special pop-up window tools to download, which puts users of WMV and WMA formats into a helpless situation. Because the pop-up windows of RM and RMVB can be easily restricted and blocked, while the DRV embedded pop-up windows used by WMV are more difficult to remove.
1. The principle of adding viruses to WMV format files
For WMV format files, use the "Microsoft Windows Media Player" of its default player Windows Media Player Server Digital Rights Management to load arbitrary web page vulnerabilities" to insert viruses.
When playing a malicious file that has been inserted into a virus, the player will first pop up a prompt window, indicating that this file has been DRM encrypted and needs to pass the URL verification certificate, and this URL is the pre-set web virus address. When the user clicks "Yes" for verification, the virus or Trojan is successfully implanted.
Like viruses in RM files, we need another tool to insert viruses into WMV files - WMDRM package encryptor. This is a file that can DRM encrypt WMV format files. The software itself is In order to protect the copyright of media files, in the hands of attackers, they become hackers' accomplices.
2. Methods to defend against viruses in WMV format files
There are various defense methods. Two of them are provided below:
(1) Change to another player.
(2) Timely upgrade the virus database of the anti-virus software and upgrade the patches of the user’s personal media playback software.
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