Find sigma rule 
Attack: Process Injection
Adversaries may inject code into processes in order to evade process-based defenses as well as possibly elevate privileges. Process injection is a method of executing arbitrary code in the address space of a separate live process. Running code in the context of another process may allow access to the process’s memory, system/network resources, and possibly elevated privileges. Execution via process injection may also evade detection from security products since the execution is masked under a legitimate process.
There are many different ways to inject code into a process, many of which abuse legitimate functionalities. These implementations exist for every major OS but are typically platform specific.
More sophisticated samples may perform multiple process injections to segment modules and further evade detection, utilizing named pipes or other inter-process communication (IPC) mechanisms as a communication channel.
MITRE
Tactic
- defense-evasion
- privilege-escalation
technique
- T1055
Test : Remote Process Injection with Go using RtlCreateUserThread WinAPI
OS
- windows
Description:
Executes shellcode in a remote process.
Steps taken with this technique
- Get a handle to the target process
- Allocate memory for the shellcode with VirtualAllocEx setting the page permissions to Read/Write
- Use the WriteProcessMemory to copy the shellcode to the allocated memory space in the remote process
- Change the memory page permissions to Execute/Read with VirtualProtectEx
- Execute the entrypoint of the shellcode in the remote process with RtlCreateUserThread
- Close the handle to the remote process
- PoC Credit: (https://github.com/Ne0nd0g/go-shellcode/tree/master#rtlcreateuserthread)
- References:
- https://www.cobaltstrike.com/blog/cobalt-strikes-process-injection-the-details-cobalt-strike
Executor
powershell