Find sigma rule 
Attack: Process Injection: Asynchronous Procedure Call
Adversaries may inject malicious code into processes via the asynchronous procedure call (APC) queue in order to evade process-based defenses as well as possibly elevate privileges. APC injection is a method of executing arbitrary code in the address space of a separate live process.
APC injection is commonly performed by attaching malicious code to the APC Queue (Citation: Microsoft APC) of a process’s thread. Queued APC functions are executed when the thread enters an alterable state.(Citation: Microsoft APC) A handle to an existing victim process is first created with native Windows API calls such as OpenThread. At this point QueueUserAPC can be used to invoke a function (such as LoadLibrayA pointing to a malicious DLL).
A variation of APC injection, dubbed “Early Bird injection”, involves creating a suspended process in which malicious code can be written and executed before the process’ entry point (and potentially subsequent anti-malware hooks) via an APC. (Citation: CyberBit Early Bird Apr 2018) AtomBombing (Citation: ENSIL AtomBombing Oct 2016) is another variation that utilizes APCs to invoke malicious code previously written to the global atom table.(Citation: Microsoft Atom Table)
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 APC injection may also evade detection from security products since the execution is masked under a legitimate process.
MITRE
Tactic
- privilege-escalation
- defense-evasion
technique
- T1055.004
Test : Process Injection via C#
OS
- windows
Description:
Process Injection using C# reference: https://github.com/pwndizzle/c-sharp-memory-injection Excercises Five Techniques
- Process injection
- ApcInjectionAnyProcess
- ApcInjectionNewProcess
- IatInjection
- ThreadHijack Upon successful execution, cmd.exe will execute T1055.exe, which exercises 5 techniques. Output will be via stdout.
Executor
command_prompt
Sigma Rule
- image_load_dll_dbghelp_dbgcore_susp_load.yml (id: 0e277796-5f23-4e49-a490-483131d4f6e1)