There's a bunch of ways. Some are obvious (like a call to IsDebuggerPresent()) and some not so much (like tripping some exception that only gets thrown when a p

There's a bunch of ways. Some are obvious (like a call to IsDebuggerPresent()) and some not so much (like tripping some exception that only gets thrown when a process is not being debugged). Youtuber MalwareAnalysisForHedgehogs[0] has some interesting videos about this and anti-reversing tricks in general. https://www.youtube.com/channel/UCVFXrUwuWxNlm6UNZtBLJ-A https://www.youtube.com/channel/UCVFXrUwuWxNlm6UNZtBLJ-A