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bobince

join:2002-04-19
DE

reply to eburger68

Re: Adware Installed through WMA Files

I can confirm PC World's story. I was recently sent one of these files.

The way it works as far as I can tell is that protectedmedia.com runs clients on the FastTrack network (Kazaa/Grokster/iMesh) offering what look like porn movies. Actually in the examples I've seen they *are* porn movies, but they're generic, not matching what the various filenames it is offered under might imply. It is likely they are also doing this with audio files too, but I haven't found any searches that will bring them up.

The files are rights-protected WMV. The licence-acquiring features in Windows Media Player involve opening up a window with some sort of licensing agreement; this is obtained by fetching the page from the URL embedded in the file, and then displaying it in an IE-engine subwindow. The trick is simply that the pages in this case contain a number of ActiveX drive-by downloaders, with wording that implies that you have to accept the downloads for the licence-acquisition process to work (in reality, the video plays anyway even if you say no). I don't know if this works on XP SP2... I suspect it does, because I believe the new yellow info bar thingy only applies to IE itself, not WMP.

These install a load of usual-suspects parasites that I'm going through at the moment, including ILookup/HotSearchBar and iSearch (Eric: who are also behind the rogue anti-spyware SpywareAvenger, you might want to note).

I just wonder how long this has been going on. As spyware researchers we've got used to tracking down web-based installers and software bundling, but porn on the P2P networks is something we've not been keeping an eye on until now.

In the meantime, I can only recommend Media Player Classic (which is a whole lot nicer than WMP even without the security considerations), and advise avoiding Windows Media files where possible.

eburger68
Premium,MVM
join:2001-04-28

1 edit

Andrew:

Thanks for confirming the substance of this story. Would it be possible to a copy of the WMA file you have? If so, please email me at eburger68@myrealbox.com.

Best,

Eric L. Howes


bedelman
Premium
join:2004-06-20
Cambridge, MA

reply to bobince

which programs get installed

Andrew:

That's another great find, as usual.

I took a look at one of these WindowsMedia files, let it install on a test PC, and made a list of what programs I got. 31 programs, 11000+ registry entries. Not a pretty sight.

Write-up and selected screen-shots »www.benedelman.org/news/010205-1.html .

Ben


GercekSeytan
Absinthe makes the heart grow fonder.
Premium
join:2001-10-19

Great link. Thanks much.


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