Wednesday, February 28, 2007

Unprotecting DRM v2-protected WMV files

Some WMV files r protected using a microsoft DRM version 2, however this version is not the only one out there and one must check whether its this version or not before attempting to crack it...

first of all, u have to have the key, since u cannot simply crack any protected content whereever its found...
if u r using WMP version 10 u should switch to 9, this is done by removing it from add/revome progs, u could also download wmp version 9 from microsoft...
if u system comes with wmp 10+ u should use xplite or something similar to strip wmp out of windows...
when u run the movie for the first time it would attempt to connect to the internet, once done it might ask u about the username/password for playing this protected content. upon enetering the correct data, the movie will play even if u disconnect from the internet since a version of the key is stored cached in \Documents and settings\all users\DRM i think...however this need not to concern us now.
download undrm from http://bradleybeast.com/sec/unDRM.zip, it will also explain this stuff in addition to the real prog which we need...Automate unDRM
copy the dlls from step2 in the mentioned zip file to windows\system32, (overwrite if prompted)
automate unDRM didnt work with its script to i had to use the commands separately...ie run
drmdbg.exe from wherever u installed automate undrm. it'll show the wmp, open the encrypted file and obtain the key and put it one ur desktop
copy drm2-i.key from ur desktop to drm2wmv_e\drm2 and drag and drop the protected content to drm2wmv_e.exe it'll extract the unprotected content for u and place it in the same folder where the protected contetn reside...
njoy...

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