Over a year ago, I left my position at WithSecure to start a new journey, create something new, and do my own thing. Today, I'm excited to publicly announce what I've been working on all this time. Introducing 0xC2, a cross-platform C2 framework targeting Windows, Linux, and MacOS environments: 0xc2.io The first release was back in late 2023, initially only offered to a small circle of red teamers and soon, the registration will be open for new clients who provide threat simulation services. All agents are written as PIC in C to provide better opsec and to allow operators to be more flexible when designing payloads. To make the agents modular and fully customizable, operators can create a user-defined virtual table that can be hooked by the agent. This can be used to change the default behavior of an agent or extend capabilities, from adding internal commands to implementing P2P protocols. More details will be available soon.