From CNet News:
Sony’s decision to include rootkit-like copy restrictions on some of its music CDs is prompting some companies to review whether they allow their staff to use personal CDs at work.
Last week, Trojan horses emerged that avoid detection by using the digital rights management, or DRM, software used by Sony BMG Music Entertainment on some of its audio CDs. This software uses the same techniques used by rootkit malicious software to hide itself from the operating system, which makes it particularly difficult to detect.
Andrew Yeomans, vice president of global information security at Dresdner Kleinwort Wasserstein, said that he is already assessing whether the Europe-based investment bank needs to tighten up its controls.