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It said that XCP uses rootkit technology to hide certain files from the user and that the technique is a security threat to users. They also said that one of the uninstallation options provided by Sony BMG introduces further vulnerabilities.
XCP.Sony.Rootkit loads a system filter driver which intercepts all calls for process, directory or registry listings, even those unrelated to the Sony BMG application. This rootkit driver modifies what information is visible to the operating system in order to cloak the Sony BMG software. This is commonly referred to as rootkit technology.
As a result, any Microsoft Windows computer that has been used to play these CDs is likely to have had XCP installed. This can cause a number of serious security problems. Several security software vendors, including Microsoft, regard XCP as a trojan horse, spyware, or rootkit. [2]
Technically inclined users and computer security professionals found that XCP contains a rootkit component. After installation, XCP went to great lengths to disguise its existence, and it even attempted to disable the computer's CD drive if XCP was forcibly removed.
In November 2005, it was revealed that Sony BMG was distributing albums with Extended Copy Protection or XCP, a controversial feature that automatically installed rootkit software on any Microsoft Windows machine upon insertion of the disc. In addition to preventing the CD's contents from being copied, it was also revealed that the software ...
On November 15, 2005, Felten and J. Alex Halderman showed that Sony's method for removing XCP copy protection software from the computer makes it more vulnerable to attack, as it essentially installed a rootkit, in the form of an Active X control used by the uninstaller, and left it on the user's machine and set so as to allow any web page ...
Rootkit detection is difficult because a rootkit may be able to subvert the software that is intended to find it. Detection methods include using an alternative and trusted operating system , behavior-based methods, signature scanning, difference scanning, and memory dump analysis.
In November 2005, it was revealed that the US CD contained Extended Copy Protection (XCP), a controversial feature that automatically installed rootkit software on any Microsoft Windows machine upon insertion of the disc. The CD was withdrawn and a new version without XCP was issued on 22 November 2005.
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