Inject-Assembly is an alternative to traditional fork and run execution for Cobalt Strike. The loader can be injected into any process, including the current Beacon. Long-running assemblies will continue to run and send output back to the Beacon, similar to the behavior of execute-assembly.
There are two components of inject-assembly:
Communication between the remote process and Beacon occurs through a named pipe. The Aggressor script generates a pipe name and then passes it to the BOF initializer.
Download and load the inject-assembly.cna Aggressor script into Cobalt Strike. You can then execute assemblies using the following command:
inject-assembly pid assembly [args…]
Specify 0 as the PID to execute in the current Beacon process.
It is recommended to use another tool, like FindObjects-BOF, to locate a process that already loads the .NET runtime, but this is not a requirement for inject-assembly to function.
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