Asynchronous procedure call. Asynchronous Procedure Calls Asynchronous Pr...
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Asynchronous procedure call. Asynchronous Procedure Calls Asynchronous Procedure Calls, or APC for short, are a mechanism in Windows - and possibly other operating systems, although I can't say for sure at the moment - that allows asynchronous execution of code to be scheduled. An understanding of this mechanism is essential to better understand how NT works and performs several core system operations. Every thread has its own APC queue, where an APC stores a function and arguments to call. The scheduling itself can be done in any thread, so a thread can schedule work on another thread or even itself. The idea is tha… Nov 10, 2024 · APC (asynchronous procedure call) In this blog, I’ll continue discussing different types of process injection. As we mentioned in the Classic process injection topic, this injection technique also used code injection for remote access, privilege escalation, or hiding malicious activities. This technique exploits Windows' built-in APC mechanism, which enables functions to be executed asynchronously in the context of a specific thread. Learn how async procedures facilitate concurrent processing, reducing latency and enhancing overall performance in software development, leveraging callback functions, multithreading, and event-driven programming to achieve seamless task execution and optimized resource utilization. on some thread. Process Injection: Asynchronous Procedure Call Other sub-techniques of Process Injection (12) 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.
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