Microsoft Threat Intelligence has identified yet another XCSSET variant in the wild that introduces further updates and new modules beyond those detailed in our March 2025 blog post.
The XCSSET malware is designed to infect Xcode projects, typically used by software developers, and run while an Xcode project is being built. We assess that this mode of infection and propagation banks on project files being shared among developers building Apple or macOS-related applications. This new variant of XCSSET brings key changes related to browser targeting, clipboard hijacking, and persistence mechanisms.
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Source: Microsoft
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