First Trojan using Sony DRM spotted
Virus writers have begun taking advantage of Sony-BMG's use of rootkit technology in DRM software bundled with its music CDs. — Sony-BMG's rootkit DRM technology masks files whose filenames start with "$sys$". A newly-discovered variant …
Context & Ripple Effects
Testing had already found that Sony-BMG's DRM installed a hidden rootkit that cloaked files and Registry keys. The newly identified Trojan turns that file-hiding mechanism exposed by earlier testing from a copy-control controversy into a usable concealment channel for malware.
The story travelled across security, technology-policy and consumer-rights outlets, reflecting that Sony-BMG's DRM implementation had become a broader trust and PC-security issue rather than a narrow music-industry dispute.
First-order effects
- Malware authors can hide a Trojan behind the same "$sys$" filename prefix Sony-BMG's DRM uses, raising the immediate risk for PCs carrying the DRM software.
- Sony-BMG's concealed DRM design becomes a direct security liability for affected customers, not only a restriction on music copying.
Second-order effects
- Security vendors and administrators must account for Sony-BMG's masking behavior when inspecting infected machines, because a filename convention associated with the DRM can also conceal malicious files.
- Sony-BMG faces intensified pressure to justify a DRM mechanism whose hidden behavior can be reused by attackers, weakening the distinction between copy protection and system compromise.
Third-order effects
- If DRM vendors rely on stealthy, kernel-level controls, security review becomes a prerequisite for distribution: anti-copying software that changes a PC's visibility rules creates an attack surface of its own.
- The episode points toward a conflict between restrictive DRM and endpoint security, in which vendors that conceal software behavior risk losing user and security-industry trust.
The trend: Digital-rights controls are becoming a security-design issue, as hidden enforcement mechanisms can be repurposed by malware authors.