This claim is being made by Mark Russinovich at Sysinternals! Anything to this?
A snippet from the blog:
An easier approach is to fool game DRM software into thinking its reading data for playing a game from its original CD rather than from an on-disk copy. DRM software uses a number of techniques to try to defeat that trick, but a straightforward one is simply to detect if CD emulation software is present on the system and if so, if the game is being run from an on-disk emulated copy. Thatâ€™s where rootkits come in. Two of the most popular CD emulation utilities are Alcohol and Daemon Tools and they both use rootkits.
Alcohol advertises itself as enabling you â€œto make a duplicate back-up to recordable media of nearly all your expensive Game/Software/DVD titles, and/or an image that can be mounted and run from any one of Alcohol's virtual drivesâ€. When you run a RootkitRevealer scan of a system on which Alcohol is installed you see several discrepancies: