CrossC2 is a cross-platform payload generation tool designed to extend CobaltStrike's capabilities beyond Windows environments. The tool enables security professionals and red team operators to create payloads that can execute on multiple operating systems including Linux and macOS. CrossC2 integrates with the CobaltStrike framework to provide command and control functionality across heterogeneous environments. The tool supports various payload formats and delivery mechanisms to facilitate post-exploitation activities on non-Windows targets. It maintains compatibility with CobaltStrike's existing infrastructure while extending operational reach to Unix-based systems.